1315431340 has 24 divisors (see below), whose sum is σ = 2768985072. Its totient is φ = 524919360.

The previous prime is 1315431319. The next prime is 1315431379. The reversal of 1315431340 is 431345131.

It is a super-2 number, since 2×1315431340² = 3460719220508391200, which contains 22 as substring.

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, 69694 + ... + 86533.

It is an arithmetic number, because the mean of its divisors is an integer number (115374378).

Almost surely, 2^1315431340 is an apocalyptic number.

1315431340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315431340 is an abundant number, since it is smaller than the sum of its proper divisors (1453553732).

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

1315431340 is a wasteful number, since it uses less digits than its factorization.

1315431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156657 (or 156655 counting only the distinct ones).

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

The square root of 1315431340 is about 36268.8756373836. The cubic root of 1315431340 is about 1095.6942811059.

Adding to 1315431340 its reverse (431345131), we get a palindrome (1746776471).

The spelling of 1315431340 in words is "one billion, three hundred fifteen million, four hundred thirty-one thousand, three hundred forty".