531930239 has 4 divisors (see below), whose sum is σ = 532015656. Its totient is φ = 531844824.

The previous prime is 531930233. The next prime is 531930281. The reversal of 531930239 is 932039135.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531930239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531930199 and 531930208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531930233) 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, 32564 + ... + 46089.

It is an arithmetic number, because the mean of its divisors is an integer number (133003914).

Almost surely, 2^531930239 is an apocalyptic number.

531930239 is a deficient number, since it is larger than the sum of its proper divisors (85417).

531930239 is an equidigital number, since it uses as much as digits as its factorization.

531930239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85416.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 531930239 is about 23063.6128782981. The cubic root of 531930239 is about 810.2484829281.

The spelling of 531930239 in words is "five hundred thirty-one million, nine hundred thirty thousand, two hundred thirty-nine".