31215445551012 has 12 divisors (see below), whose sum is σ = 72836039619056. Its totient is φ = 10405148517000.

The previous prime is 31215445550977. The next prime is 31215445551029. The reversal of 31215445551012 is 21015554451213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×31215445551012³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300643564614 + ... + 1300643564637.

Almost surely, 2^{31215445551012} is an apocalyptic number.

It is an amenable number.

31215445551012 is an abundant number, since it is smaller than the sum of its proper divisors (41620594068044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31215445551012 is a wasteful number, since it uses less digits than its factorization.

31215445551012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601287129258 (or 2601287129256 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 39.

The spelling of 31215445551012 in words is "thirty-one trillion, two hundred fifteen billion, four hundred forty-five million, five hundred fifty-one thousand, twelve".