313144531 has 4 divisors (see below), whose sum is σ = 357879472. Its totient is φ = 268409592.

The previous prime is 313144501. The next prime is 313144543. The reversal of 313144531 is 135441313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 313144531 - 2⁵ = 313144499 is a prime.

It is a super-2 number, since 2×313144531² = 196118994590419922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313144496 and 313144505.

It is not an unprimeable number, because it can be changed into a prime (313144501) 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, 22367460 + ... + 22367473.

It is an arithmetic number, because the mean of its divisors is an integer number (89469868).

Almost surely, 2^313144531 is an apocalyptic number.

313144531 is a deficient number, since it is larger than the sum of its proper divisors (44734941).

313144531 is an equidigital number, since it uses as much as digits as its factorization.

313144531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44734940.

The product of its digits is 2160, while the sum is 25.

The square root of 313144531 is about 17695.8902290899. The cubic root of 313144531 is about 679.0706241163.

Adding to 313144531 its reverse (135441313), we get a palindrome (448585844).

The spelling of 313144531 in words is "three hundred thirteen million, one hundred forty-four thousand, five hundred thirty-one".