315813 has 12 divisors (see below), whose sum is σ = 442400. Its totient is φ = 200376.

The previous prime is 315811. The next prime is 315829. The reversal of 315813 is 318513.

It is a happy number.

It is not a de Polignac number, because 315813 - 2¹ = 315811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1488 + ... + 1686.

2³¹⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

315813 is a deficient number, since it is larger than the sum of its proper divisors (126587).

315813 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 315813 = (531183)₉.

315813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 225 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 315813 is about 561.9724192520. The cubic root of 315813 is about 68.0994076639.

It can be divided in two parts, 315 and 813, that added together give a triangular number (1128 = T₄₇).

The spelling of 315813 in words is "three hundred fifteen thousand, eight hundred thirteen".