31325266720 has 48 divisors (see below), whose sum is σ = 80733760128. Its totient is φ = 11391005440.

The previous prime is 31325266717. The next prime is 31325266729. The reversal of 31325266720 is 2766252313.

It is a self number, because there is not a number n which added to its sum of digits gives 31325266720.

It is not an unprimeable number, because it can be changed into a prime (31325266729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8897464 + ... + 8900983.

It is an arithmetic number, because the mean of its divisors is an integer number (1681953336).

Almost surely, 2^31325266720 is an apocalyptic number.

It is an amenable number.

31325266720 is an abundant number, since it is smaller than the sum of its proper divisors (49408493408).

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

31325266720 is a wasteful number, since it uses less digits than its factorization.

31325266720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17798473 (or 17798465 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 31325266720 in words is "thirty-one billion, three hundred twenty-five million, two hundred sixty-six thousand, seven hundred twenty".