31212542052 has 48 divisors (see below), whose sum is σ = 81464544000. Its totient is φ = 10334348640.

The previous prime is 31212541993. The next prime is 31212542059. The reversal of 31212542052 is 25024521213.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31212542059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953724 + ... + 985907.

It is an arithmetic number, because the mean of its divisors is an integer number (1697178000).

Almost surely, 2^31212542052 is an apocalyptic number.

It is an amenable number.

31212542052 is an abundant number, since it is smaller than the sum of its proper divisors (50252001948).

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

31212542052 is a wasteful number, since it uses less digits than its factorization.

31212542052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939793 (or 1939785 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 31212542052 in words is "thirty-one billion, two hundred twelve million, five hundred forty-two thousand, fifty-two".