31326222540 has 48 divisors (see below), whose sum is σ = 87725621088. Its totient is φ = 8352497664.

The previous prime is 31326222527. The next prime is 31326222547. The reversal of 31326222540 is 4522262313.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31326222498 and 31326222507.

It is not an unprimeable number, because it can be changed into a prime (31326222547) 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, 453324 + ... + 517836.

It is an arithmetic number, because the mean of its divisors is an integer number (1827617106).

Almost surely, 2^31326222540 is an apocalyptic number.

31326222540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31326222540 is an abundant number, since it is smaller than the sum of its proper divisors (56399398548).

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

31326222540 is a wasteful number, since it uses less digits than its factorization.

31326222540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72618 (or 72616 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 31326222540 its reverse (4522262313), we get a palindrome (35848484853).

The spelling of 31326222540 in words is "thirty-one billion, three hundred twenty-six million, two hundred twenty-two thousand, five hundred forty".