1315388256 has 96 divisors (see below), whose sum is σ = 4249744128. Its totient is φ = 346913280.

The previous prime is 1315388251. The next prime is 1315388267. The reversal of 1315388256 is 6528835131.

1315388256 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315388251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66550 + ... + 84021.

It is an arithmetic number, because the mean of its divisors is an integer number (44268168).

Almost surely, 2^1315388256 is an apocalyptic number.

1315388256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1315388256 is an abundant number, since it is smaller than the sum of its proper divisors (2934355872).

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

1315388256 is a wasteful number, since it uses less digits than its factorization.

1315388256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150604 (or 150596 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 1315388256 is about 36268.2816797267. The cubic root of 1315388256 is about 1095.6823186400.

The spelling of 1315388256 in words is "one billion, three hundred fifteen million, three hundred eighty-eight thousand, two hundred fifty-six".