813264531 has 8 divisors (see below), whose sum is σ = 1084688784. Its totient is φ = 542008320.

The previous prime is 813264511. The next prime is 813264541. The reversal of 813264531 is 135462318.

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

It is not a de Polignac number, because 813264531 - 2¹⁴ = 813248147 is a prime.

It is a super-2 number, since 2×813264531² = 1322798394765299922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813264492 and 813264501.

It is not an unprimeable number, because it can be changed into a prime (813264511) 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, 30246 + ... + 50411.

It is an arithmetic number, because the mean of its divisors is an integer number (135586098).

Almost surely, 2^813264531 is an apocalyptic number.

813264531 is a deficient number, since it is larger than the sum of its proper divisors (271424253).

813264531 is a wasteful number, since it uses less digits than its factorization.

813264531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84021.

The product of its digits is 17280, while the sum is 33.

The square root of 813264531 is about 28517.7932351015. The cubic root of 813264531 is about 933.4203764767.

The spelling of 813264531 in words is "eight hundred thirteen million, two hundred sixty-four thousand, five hundred thirty-one".