1315631156 has 24 divisors (see below), whose sum is σ = 2786043456. Its totient is φ = 530674560.

The previous prime is 1315631153. The next prime is 1315631171. The reversal of 1315631156 is 6511365131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315631153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381490 + ... + 1382441.

It is an arithmetic number, because the mean of its divisors is an integer number (116085144).

Almost surely, 2^1315631156 is an apocalyptic number.

It is an amenable number.

1315631156 is an abundant number, since it is smaller than the sum of its proper divisors (1470412300).

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

1315631156 is a wasteful number, since it uses less digits than its factorization.

1315631156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763959 (or 2763957 counting only the distinct ones).

The product of its digits is 8100, while the sum is 32.

The square root of 1315631156 is about 36271.6301811760. The cubic root of 1315631156 is about 1095.7497575004.

Adding to 1315631156 its reverse (6511365131), we get a palindrome (7826996287).

The spelling of 1315631156 in words is "one billion, three hundred fifteen million, six hundred thirty-one thousand, one hundred fifty-six".