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31130221101 = 372695939293
BaseRepresentation
bin11100111111100000…
…010111101000101101
32222100112000002020220
4130333200113220231
51002223314033401
622145004401553
72151302341050
oct347740275055
988315002226
1031130221101
111222521a961
1260495462b9
132c21597595
1417145b2a97
15c22e7e336
hex73f817a2d

31130221101 has 32 divisors (see below), whose sum is σ = 47698295040. Its totient is φ = 17690778624.

The previous prime is 31130221093. The next prime is 31130221117. The reversal of 31130221101 is 10112203113.

It is a happy number.

It is not a de Polignac number, because 31130221101 - 23 = 31130221093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130221121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3345211 + ... + 3354503.

It is an arithmetic number, because the mean of its divisors is an integer number (1490571720).

Almost surely, 231130221101 is an apocalyptic number.

It is an amenable number.

31130221101 is a deficient number, since it is larger than the sum of its proper divisors (16568073939).

31130221101 is a wasteful number, since it uses less digits than its factorization.

31130221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10165.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31130221101 its reverse (10112203113), we get a palindrome (41242424214).

The spelling of 31130221101 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-one thousand, one hundred one".

Divisors: 1 3 7 21 269 593 807 1779 1883 4151 5649 9293 12453 27879 65051 159517 195153 478551 1116619 2499817 3349857 5510749 7499451 16532247 17498719 38575243 52496157 115725729 1482391481 4447174443 10376740367 31130221101