531550401 has 32 divisors (see below), whose sum is σ = 767950848. Its totient is φ = 326187840.

The previous prime is 531550387. The next prime is 531550417. The reversal of 531550401 is 104055135.

It is not a de Polignac number, because 531550401 - 2⁶ = 531550337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531550301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196480 + ... + 199166.

It is an arithmetic number, because the mean of its divisors is an integer number (23998464).

Almost surely, 2^531550401 is an apocalyptic number.

It is an amenable number.

531550401 is a deficient number, since it is larger than the sum of its proper divisors (236400447).

531550401 is a wasteful number, since it uses less digits than its factorization.

531550401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 531550401 is about 23055.3768349164. The cubic root of 531550401 is about 810.0555776527.

The spelling of 531550401 in words is "five hundred thirty-one million, five hundred fifty thousand, four hundred one".