31212525112 has 8 divisors (see below), whose sum is σ = 58523484600. Its totient is φ = 15606262552.

The previous prime is 31212525109. The next prime is 31212525131. The reversal of 31212525112 is 21152521213.

It is a happy number.

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

It is a super-2 number, since 2×31212525112² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950782812 + ... + 1950782827.

It is an arithmetic number, because the mean of its divisors is an integer number (7315435575).

Almost surely, 2^31212525112 is an apocalyptic number.

It is an amenable number.

31212525112 is a deficient number, since it is larger than the sum of its proper divisors (27310959488).

31212525112 is a wasteful number, since it uses less digits than its factorization.

31212525112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3901565645 (or 3901565641 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The spelling of 31212525112 in words is "thirty-one billion, two hundred twelve million, five hundred twenty-five thousand, one hundred twelve".