536431921 has 27 divisors (see below), whose sum is σ = 603214059. Its totient is φ = 476931312.

The previous prime is 536431901. The next prime is 536431927. The reversal of 536431921 is 129134635.

The square root of 536431921 is 23161.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 386712225 + 149719696 = 19665^2 + 12236^2 .

It is not a de Polignac number, because 536431921 - 2⁷ = 536431793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (536431927) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10121331 + ... + 10121383.

Almost surely, 2^536431921 is an apocalyptic number.

536431921 is the 23161-st square number.

536431921 is the 11581-st centered octagonal number.

It is an amenable number.

536431921 is a deficient number, since it is larger than the sum of its proper divisors (66782138).

536431921 is an equidigital number, since it uses as much as digits as its factorization.

536431921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 95 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The cubic root of 536431921 is about 812.5277540342.

The spelling of 536431921 in words is "five hundred thirty-six million, four hundred thirty-one thousand, nine hundred twenty-one".