531161023 has 2 divisors, whose sum is σ = 531161024. Its totient is φ = 531161022.

The previous prime is 531161021. The next prime is 531161051. The reversal of 531161023 is 320161135.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531161023 - 2¹ = 531161021 is a prime.

Together with 531161021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 531160985 and 531161003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531161021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265580511 + 265580512.

It is an arithmetic number, because the mean of its divisors is an integer number (265580512).

Almost surely, 2^531161023 is an apocalyptic number.

531161023 is a deficient number, since it is larger than the sum of its proper divisors (1).

531161023 is an equidigital number, since it uses as much as digits as its factorization.

531161023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 531161023 is about 23046.9308802712. The cubic root of 531161023 is about 809.8577319612.

The spelling of 531161023 in words is "five hundred thirty-one million, one hundred sixty-one thousand, twenty-three".