31002165412 has 24 divisors (see below), whose sum is σ = 56116256000. Its totient is φ = 14970955680.

The previous prime is 31002165409. The next prime is 31002165419. The reversal of 31002165412 is 21456120013.

It is a happy number.

It is a super-2 number, since 2×31002165412² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31002165419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188643 + ... + 312394.

Almost surely, 2^31002165412 is an apocalyptic number.

It is an amenable number.

31002165412 is a deficient number, since it is larger than the sum of its proper divisors (25114090588).

31002165412 is a wasteful number, since it uses less digits than its factorization.

31002165412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501571 (or 501569 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 31002165412 its reverse (21456120013), we get a palindrome (52458285425).

The spelling of 31002165412 in words is "thirty-one billion, two million, one hundred sixty-five thousand, four hundred twelve".