31330480 has 20 divisors (see below), whose sum is σ = 72843552. Its totient is φ = 12532160.

The previous prime is 31330471. The next prime is 31330489. The reversal of 31330480 is 8403313.

It is an interprime number because it is at equal distance from previous prime (31330471) and next prime (31330489).

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (31330489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195736 + ... + 195895.

Almost surely, 2^31330480 is an apocalyptic number.

It is an amenable number.

31330480 is an abundant number, since it is smaller than the sum of its proper divisors (41513072).

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

31330480 is a wasteful number, since it uses less digits than its factorization.

31330480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391644 (or 391638 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31330480 is about 5597.3636651552. The cubic root of 31330480 is about 315.2504265393.

Adding to 31330480 its reverse (8403313), we get a palindrome (39733793).

The spelling of 31330480 in words is "thirty-one million, three hundred thirty thousand, four hundred eighty".