315231440 has 40 divisors (see below), whose sum is σ = 736024320. Its totient is φ = 125557376.

The previous prime is 315231437. The next prime is 315231461. The reversal of 315231440 is 44132513.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10877 + ... + 27363.

It is an arithmetic number, because the mean of its divisors is an integer number (18400608).

Almost surely, 2^315231440 is an apocalyptic number.

It is an amenable number.

315231440 is an abundant number, since it is smaller than the sum of its proper divisors (420792880).

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

315231440 is a wasteful number, since it uses less digits than its factorization.

315231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16739 (or 16733 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 315231440 is about 17754.7582354703. The cubic root of 315231440 is about 680.5758098564.

Adding to 315231440 its reverse (44132513), we get a palindrome (359363953).

The spelling of 315231440 in words is "three hundred fifteen million, two hundred thirty-one thousand, four hundred forty".