31012005512 has 8 divisors (see below), whose sum is σ = 58147510350. Its totient is φ = 15506002752.

The previous prime is 31012005499. The next prime is 31012005553. The reversal of 31012005512 is 21550021013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30643902916 + 368102596 = 175054^2 + 19186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1938250337 + ... + 1938250352.

Almost surely, 2^31012005512 is an apocalyptic number.

It is an amenable number.

31012005512 is a deficient number, since it is larger than the sum of its proper divisors (27135504838).

31012005512 is a wasteful number, since it uses less digits than its factorization.

31012005512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876500695 (or 3876500691 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 31012005512 its reverse (21550021013), we get a palindrome (52562026525).

The spelling of 31012005512 in words is "thirty-one billion, twelve million, five thousand, five hundred twelve".