313261540 has 24 divisors (see below), whose sum is σ = 658200312. Its totient is φ = 125237760.

The previous prime is 313261523. The next prime is 313261631. The reversal of 313261540 is 45162313.

It can be written as a sum of positive squares in 4 ways, for example, as 2585664 + 310675876 = 1608^2 + 17626^2 .

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, 53980 + ... + 59500.

It is an arithmetic number, because the mean of its divisors is an integer number (27425013).

Almost surely, 2^313261540 is an apocalyptic number.

It is an amenable number.

313261540 is an abundant number, since it is smaller than the sum of its proper divisors (344938772).

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

313261540 is a wasteful number, since it uses less digits than its factorization.

313261540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8367 (or 8365 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 313261540 is about 17699.1960269386. The cubic root of 313261540 is about 679.1551936704.

The spelling of 313261540 in words is "three hundred thirteen million, two hundred sixty-one thousand, five hundred forty".