531699642 has 24 divisors (see below), whose sum is σ = 1152793044. Its totient is φ = 177113664.

The previous prime is 531699611. The next prime is 531699647. The reversal of 531699642 is 246996135.

It can be written as a sum of positive squares in 2 ways, for example, as 529046001 + 2653641 = 23001^2 + 1629^2 .

It is not an unprimeable number, because it can be changed into a prime (531699647) 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, 19878 + ... + 38190.

Almost surely, 2^531699642 is an apocalyptic number.

531699642 is an abundant number, since it is smaller than the sum of its proper divisors (621093402).

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

531699642 is a wasteful number, since it uses less digits than its factorization.

531699642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19934 (or 19931 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 531699642 is about 23058.6131846649. The cubic root of 531699642 is about 810.1313824380.

The spelling of 531699642 in words is "five hundred thirty-one million, six hundred ninety-nine thousand, six hundred forty-two".