531142528 has 32 divisors (see below), whose sum is σ = 1209299760. Its totient is φ = 227632128.

The previous prime is 531142523. The next prime is 531142559. The reversal of 531142528 is 825241135.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×531142528² = 564224770100461568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 531142528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531142523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295501 + ... + 297292.

Almost surely, 2^531142528 is an apocalyptic number.

It is an amenable number.

531142528 is an abundant number, since it is smaller than the sum of its proper divisors (678157232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531142528 is an equidigital number, since it uses as much as digits as its factorization.

531142528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592814 (or 592802 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 531142528 is about 23046.5296302936. The cubic root of 531142528 is about 809.8483321170.

The spelling of 531142528 in words is "five hundred thirty-one million, one hundred forty-two thousand, five hundred twenty-eight".