315528993 has 32 divisors (see below), whose sum is σ = 533030400. Its totient is φ = 182746368.

The previous prime is 315528979. The next prime is 315529021. The reversal of 315528993 is 399825513.

315528993 is a `hidden beast` number, since 3 + 1 + 552 + 8 + 9 + 93 = 666.

It is not a de Polignac number, because 315528993 - 2⁴ = 315528977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315528593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20473 + ... + 32406.

It is an arithmetic number, because the mean of its divisors is an integer number (16657200).

Almost surely, 2^315528993 is an apocalyptic number.

It is an amenable number.

315528993 is a deficient number, since it is larger than the sum of its proper divisors (217501407).

315528993 is a wasteful number, since it uses less digits than its factorization.

315528993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52918 (or 52912 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 315528993 is about 17763.1357873547. The cubic root of 315528993 is about 680.7898787011.

The spelling of 315528993 in words is "three hundred fifteen million, five hundred twenty-eight thousand, nine hundred ninety-three".