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1630171225220 = 22585795109173
BaseRepresentation
bin10111101110001101110…
…001101101110010000100
312202211202102202112012012
4113232031301231302010
5203202042313201340
63244520150513352
7225530106533546
oct27561561556204
95684672675165
101630171225220
1157939618156a
12223b31065858
13ba95590c025
1458c87787696
152c610281565
hex17b8dc6dc84

1630171225220 has 24 divisors (see below), whose sum is σ = 3427354194264. Its totient is φ = 651307609856.

The previous prime is 1630171225213. The next prime is 1630171225223. The reversal of 1630171225220 is 225221710361.

It can be written as a sum of positive squares in 4 ways, for example, as 428354542144 + 1201816683076 = 654488^2 + 1096274^2 .

It is not an unprimeable number, because it can be changed into a prime (1630171225223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47537447 + ... + 47571726.

It is an arithmetic number, because the mean of its divisors is an integer number (142806424761).

Almost surely, 21630171225220 is an apocalyptic number.

1630171225220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630171225220 is an abundant number, since it is smaller than the sum of its proper divisors (1797182969044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1630171225220 is a wasteful number, since it uses less digits than its factorization.

1630171225220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95110039 (or 95110037 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 1630171225220 its reverse (225221710361), we get a palindrome (1855392935581).

The spelling of 1630171225220 in words is "one trillion, six hundred thirty billion, one hundred seventy-one million, two hundred twenty-five thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 857 1714 3428 4285 8570 17140 95109173 190218346 380436692 475545865 951091730 1902183460 81508561261 163017122522 326034245044 407542806305 815085612610 1630171225220