313232540 has 24 divisors (see below), whose sum is σ = 658709520. Its totient is φ = 125117568.

The previous prime is 313232527. The next prime is 313232573. The reversal of 313232540 is 45232313.

It is a super-2 number, since 2×313232540² = 196229248229703200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4184 + ... + 25376.

It is an arithmetic number, because the mean of its divisors is an integer number (27446230).

Almost surely, 2^313232540 is an apocalyptic number.

It is an amenable number.

313232540 is an abundant number, since it is smaller than the sum of its proper divisors (345476980).

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

313232540 is a wasteful number, since it uses less digits than its factorization.

313232540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21941 (or 21939 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 313232540 is about 17698.3767617259. The cubic root of 313232540 is about 679.1342355615.

Adding to 313232540 its reverse (45232313), we get a palindrome (358464853).

The spelling of 313232540 in words is "three hundred thirteen million, two hundred thirty-two thousand, five hundred forty".