1315331440 has 40 divisors (see below), whose sum is σ = 3062357568. Its totient is φ = 525408000.

The previous prime is 1315331417. The next prime is 1315331483. The reversal of 1315331440 is 441335131.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49134 + ... + 71026.

Almost surely, 2^1315331440 is an apocalyptic number.

1315331440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315331440 is an abundant number, since it is smaller than the sum of its proper divisors (1747026128).

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

1315331440 is a wasteful number, since it uses less digits than its factorization.

1315331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22657 (or 22651 counting only the distinct ones).

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

The square root of 1315331440 is about 36267.4983973254. The cubic root of 1315331440 is about 1095.6665430233. Note that the first 3 decimals are identical.

Adding to 1315331440 its reverse (441335131), we get a palindrome (1756666571).

The spelling of 1315331440 in words is "one billion, three hundred fifteen million, three hundred thirty-one thousand, four hundred forty".