31152994081 has 24 divisors (see below), whose sum is σ = 35744859752. Its totient is φ = 27103507200.

The previous prime is 31152994079. The next prime is 31152994097. The reversal of 31152994081 is 18049925113.

It can be written as a sum of positive squares in 4 ways, for example, as 1114558225 + 30038435856 = 33385^2 + 173316^2 .

It is not a de Polignac number, because 31152994081 - 2¹ = 31152994079 is a prime.

It is a super-2 number, since 2×31152994081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31152994031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216061 + ... + 330133.

Almost surely, 2^31152994081 is an apocalyptic number.

It is an amenable number.

31152994081 is a deficient number, since it is larger than the sum of its proper divisors (4591865671).

31152994081 is a wasteful number, since it uses less digits than its factorization.

31152994081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114193 (or 114182 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 31152994081 in words is "thirty-one billion, one hundred fifty-two million, nine hundred ninety-four thousand, eighty-one".