31251422005540 has 48 divisors (see below), whose sum is σ = 72157900437504. Its totient is φ = 11274671923200.

The previous prime is 31251422005511. The next prime is 31251422005553. The reversal of 31251422005540 is 4550022415213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31251422005496 and 31251422005505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559231581 + ... + 559287460.

It is an arithmetic number, because the mean of its divisors is an integer number (1503289592448).

Almost surely, 2^{31251422005540} is an apocalyptic number.

It is an amenable number.

31251422005540 is an abundant number, since it is smaller than the sum of its proper divisors (40906478431964).

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

31251422005540 is a wasteful number, since it uses less digits than its factorization.

31251422005540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118519188 (or 1118519186 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 31251422005540 in words is "thirty-one trillion, two hundred fifty-one billion, four hundred twenty-two million, five thousand, five hundred forty".