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3130101220 = 225156505061
BaseRepresentation
bin1011101010010001…
…1000110111100100
322002010211121122211
42322210120313210
522402301214340
61234332533204
7140365264351
oct27244306744
98063747584
103130101220
111366951414
12734321204
133ab6370cc
142199d1628
15134be25ea
hexba918de4

3130101220 has 12 divisors (see below), whose sum is σ = 6573212604. Its totient is φ = 1252040480.

The previous prime is 3130101199. The next prime is 3130101223. The reversal of 3130101220 is 221010313.

3130101220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 485673444 + 2644427776 = 22038^2 + 51424^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3130101220.

It is not an unprimeable number, because it can be changed into a prime (3130101223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78252511 + ... + 78252550.

It is an arithmetic number, because the mean of its divisors is an integer number (547767717).

Almost surely, 23130101220 is an apocalyptic number.

It is an amenable number.

3130101220 is an abundant number, since it is smaller than the sum of its proper divisors (3443111384).

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

3130101220 is a wasteful number, since it uses less digits than its factorization.

3130101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156505070 (or 156505068 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3130101220 is about 55947.3075312834. The cubic root of 3130101220 is about 1462.8039597114.

Adding to 3130101220 its reverse (221010313), we get a palindrome (3351111533).

The spelling of 3130101220 in words is "three billion, one hundred thirty million, one hundred one thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 156505061 313010122 626020244 782525305 1565050610 3130101220