315640245 has 16 divisors (see below), whose sum is σ = 506463552. Its totient is φ = 167861760.

The previous prime is 315640211. The next prime is 315640267. The reversal of 315640245 is 542046513.

It is not a de Polignac number, because 315640245 - 2¹⁵ = 315607477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24511 + ... + 35100.

It is an arithmetic number, because the mean of its divisors is an integer number (31653972).

Almost surely, 2^315640245 is an apocalyptic number.

It is an amenable number.

315640245 is a deficient number, since it is larger than the sum of its proper divisors (190823307).

315640245 is a wasteful number, since it uses less digits than its factorization.

315640245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59972.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 315640245 is about 17766.2670530418. The cubic root of 315640245 is about 680.8698822691.

Adding to 315640245 its reverse (542046513), we get a palindrome (857686758).

The spelling of 315640245 in words is "three hundred fifteen million, six hundred forty thousand, two hundred forty-five".