531163123 has 2 divisors, whose sum is σ = 531163124. Its totient is φ = 531163122.

The previous prime is 531163109. The next prime is 531163177. The reversal of 531163123 is 321361135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531163123 - 2⁵ = 531163091 is a prime.

It is a super-2 number, since 2×531163123² = 564268526470226258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (531163223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265581561 + 265581562.

It is an arithmetic number, because the mean of its divisors is an integer number (265581562).

Almost surely, 2^531163123 is an apocalyptic number.

531163123 is a deficient number, since it is larger than the sum of its proper divisors (1).

531163123 is an equidigital number, since it uses as much as digits as its factorization.

531163123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 531163123 is about 23046.9764394378. The cubic root of 531163123 is about 809.8587992452.

The spelling of 531163123 in words is "five hundred thirty-one million, one hundred sixty-three thousand, one hundred twenty-three".