313531505 has 16 divisors (see below), whose sum is σ = 431633664. Its totient is φ = 214169280.

The previous prime is 313531453. The next prime is 313531511. The reversal of 313531505 is 505135313.

It is not a de Polignac number, because 313531505 - 2²⁶ = 246422641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7826 + ... + 26235.

It is an arithmetic number, because the mean of its divisors is an integer number (26977104).

Almost surely, 2^313531505 is an apocalyptic number.

313531505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

313531505 is a deficient number, since it is larger than the sum of its proper divisors (118102159).

313531505 is a wasteful number, since it uses less digits than its factorization.

313531505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34336.

The product of its (nonzero) digits is 3375, while the sum is 26.

The square root of 313531505 is about 17706.8208608999. The cubic root of 313531505 is about 679.3502335594.

Adding to 313531505 its reverse (505135313), we get a palindrome (818666818).

The spelling of 313531505 in words is "three hundred thirteen million, five hundred thirty-one thousand, five hundred five".