561982531 has 8 divisors (see below), whose sum is σ = 628025328. Its totient is φ = 498432000.

The previous prime is 561982517. The next prime is 561982571. The reversal of 561982531 is 135289165.

561982531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561982531 - 2⁷ = 561982403 is a prime.

It is a super-2 number, since 2×561982531² = 631648730298331922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561982571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622590 + ... + 623491.

It is an arithmetic number, because the mean of its divisors is an integer number (78503166).

Almost surely, 2^561982531 is an apocalyptic number.

561982531 is a deficient number, since it is larger than the sum of its proper divisors (66042797).

561982531 is a wasteful number, since it uses less digits than its factorization.

561982531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246133.

The product of its digits is 64800, while the sum is 40.

The square root of 561982531 is about 23706.1707367512. The cubic root of 561982531 is about 825.2286019699.

The spelling of 561982531 in words is "five hundred sixty-one million, nine hundred eighty-two thousand, five hundred thirty-one".