315205397 has 8 divisors (see below), whose sum is σ = 339592344. Its totient is φ = 290838528.

The previous prime is 315205391. The next prime is 315205399. The reversal of 315205397 is 793502513.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42328036 + 272877361 = 6506^2 + 16519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315205397 - 2⁶ = 315205333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315205391) 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, 49973 + ... + 55925.

It is an arithmetic number, because the mean of its divisors is an integer number (42449043).

Almost surely, 2^315205397 is an apocalyptic number.

It is an amenable number.

315205397 is a deficient number, since it is larger than the sum of its proper divisors (24386947).

315205397 is a wasteful number, since it uses less digits than its factorization.

315205397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 315205397 is about 17754.0248112928. The cubic root of 315205397 is about 680.5570673055.

The spelling of 315205397 in words is "three hundred fifteen million, two hundred five thousand, three hundred ninety-seven".