315557 has 4 divisors (see below), whose sum is σ = 344256. Its totient is φ = 286860.

The previous prime is 315551. The next prime is 315559. The reversal of 315557 is 755513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755513 = 11 ⋅68683.

It is a cyclic number.

It is not a de Polignac number, because 315557 - 2⁶ = 315493 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14333 + ... + 14354.

It is an arithmetic number, because the mean of its divisors is an integer number (86064).

2³¹⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

315557 is a deficient number, since it is larger than the sum of its proper divisors (28699).

315557 is a wasteful number, since it uses less digits than its factorization.

315557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28698.

The product of its digits is 2625, while the sum is 26.

The square root of 315557 is about 561.7446038904. The cubic root of 315557 is about 68.0810020873.

The spelling of 315557 in words is "three hundred fifteen thousand, five hundred fifty-seven".