531406523 has 2 divisors, whose sum is σ = 531406524. Its totient is φ = 531406522.

The previous prime is 531406511. The next prime is 531406571. The reversal of 531406523 is 325604135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531406523 - 2⁴ = 531406507 is a prime.

It is not a weakly prime, because it can be changed into another prime (531406823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265703261 + 265703262.

It is an arithmetic number, because the mean of its divisors is an integer number (265703262).

Almost surely, 2^531406523 is an apocalyptic number.

531406523 is a deficient number, since it is larger than the sum of its proper divisors (1).

531406523 is an equidigital number, since it uses as much as digits as its factorization.

531406523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 531406523 is about 23052.2563537715. The cubic root of 531406523 is about 809.9824834905.

The spelling of 531406523 in words is "five hundred thirty-one million, four hundred six thousand, five hundred twenty-three".