816263531 has 2 divisors, whose sum is σ = 816263532. Its totient is φ = 816263530.

The previous prime is 816263501. The next prime is 816263587. The reversal of 816263531 is 135362618.

816263531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816263531 - 2⁶ = 816263467 is a prime.

It is a super-2 number, since 2×816263531² = 1332572304081175922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 816263491 and 816263500.

It is not a weakly prime, because it can be changed into another prime (816263501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408131765 + 408131766.

It is an arithmetic number, because the mean of its divisors is an integer number (408131766).

Almost surely, 2^816263531 is an apocalyptic number.

816263531 is a deficient number, since it is larger than the sum of its proper divisors (1).

816263531 is an equidigital number, since it uses as much as digits as its factorization.

816263531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 816263531 is about 28570.3260569424. The cubic root of 816263531 is about 934.5663315317.

The spelling of 816263531 in words is "eight hundred sixteen million, two hundred sixty-three thousand, five hundred thirty-one".