31420645423256 has 16 divisors (see below), whose sum is σ = 59743480735440. Its totient is φ = 15489050560480.

The previous prime is 31420645423217. The next prime is 31420645423283. The reversal of 31420645423256 is 65232454602413.

It is a self number, because there is not a number n which added to its sum of digits gives 31420645423256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27659018291 + ... + 27659019426.

It is an arithmetic number, because the mean of its divisors is an integer number (3733967545965).

Almost surely, 2^{31420645423256} is an apocalyptic number.

It is an amenable number.

31420645423256 is a deficient number, since it is larger than the sum of its proper divisors (28322835312184).

31420645423256 is a wasteful number, since it uses less digits than its factorization.

31420645423256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55318037794 (or 55318037790 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 31420645423256 in words is "thirty-one trillion, four hundred twenty billion, six hundred forty-five million, four hundred twenty-three thousand, two hundred fifty-six".