31226070681 has 81 divisors (see below), whose sum is σ = 51317102109. Its totient is φ = 18287260992.

The previous prime is 31226070661. The next prime is 31226070761. The reversal of 31226070681 is 18607062213.

The square root of 31226070681 is 176709.

It is a perfect power (a square), and thus also a powerful number.

31226070681 is a `hidden beast` number, since 312 + 260 + 7 + 0 + 6 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1944016281 + 29282054400 = 44091^2 + 171120^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31226070681 is a prime.

It is a super-2 number, since 2×31226070681² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31226070661) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 158507875 + ... + 158508071.

Almost surely, 2^31226070681 is an apocalyptic number.

31226070681 is the 176709-th square number.

31226070681 is the 88355-th centered octagonal number.

It is an amenable number.

31226070681 is a deficient number, since it is larger than the sum of its proper divisors (20091031428).

31226070681 is a wasteful number, since it uses less digits than its factorization.

31226070681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Multiplying 31226070681 by its sum of digits (36), we get a square (1124138544516 = 1060254²).

The spelling of 31226070681 in words is "thirty-one billion, two hundred twenty-six million, seventy thousand, six hundred eighty-one".