1315515252 has 24 divisors (see below), whose sum is σ = 3115351456. Its totient is φ = 431959968.

The previous prime is 1315515239. The next prime is 1315515259. The reversal of 1315515252 is 2525155131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315515259) 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, 817303 + ... + 818910.

Almost surely, 2^1315515252 is an apocalyptic number.

1315515252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1315515252 is an abundant number, since it is smaller than the sum of its proper divisors (1799836204).

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

1315515252 is a wasteful number, since it uses less digits than its factorization.

1315515252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636287 (or 1636285 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 1315515252 is about 36270.0324234760. The cubic root of 1315515252 is about 1095.7175788995.

The spelling of 1315515252 in words is "one billion, three hundred fifteen million, five hundred fifteen thousand, two hundred fifty-two".