531322398 has 24 divisors (see below), whose sum is σ = 1190896200. Its totient is φ = 171000144.

The previous prime is 531322381. The next prime is 531322399. The reversal of 531322398 is 893223135.

531322398 is a `hidden beast` number, since 531 + 32 + 2 + 3 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531322399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508408 + ... + 509451.

It is an arithmetic number, because the mean of its divisors is an integer number (49620675).

Almost surely, 2^531322398 is an apocalyptic number.

531322398 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

531322398 is an abundant number, since it is smaller than the sum of its proper divisors (659573802).

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

531322398 is a wasteful number, since it uses less digits than its factorization.

531322398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017896 (or 1017893 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 531322398 is about 23050.4316228569. The cubic root of 531322398 is about 809.9397394585.

The spelling of 531322398 in words is "five hundred thirty-one million, three hundred twenty-two thousand, three hundred ninety-eight".