801256531 has 2 divisors, whose sum is σ = 801256532. Its totient is φ = 801256530.

The previous prime is 801256523. The next prime is 801256537. The reversal of 801256531 is 135652108.

801256531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 801256531 - 2³ = 801256523 is a prime.

It is a super-2 number, since 2×801256531² = 1284024056940307922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 801256493 and 801256502.

It is not a weakly prime, because it can be changed into another prime (801256537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400628265 + 400628266.

It is an arithmetic number, because the mean of its divisors is an integer number (400628266).

Almost surely, 2^801256531 is an apocalyptic number.

801256531 is a deficient number, since it is larger than the sum of its proper divisors (1).

801256531 is an equidigital number, since it uses as much as digits as its factorization.

801256531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 801256531 is about 28306.4750719690. The cubic root of 801256531 is about 928.8035375053.

The spelling of 801256531 in words is "eight hundred one million, two hundred fifty-six thousand, five hundred thirty-one".