566720231 has 48 divisors (see below), whose sum is σ = 747425952. Its totient is φ = 424569600.

The previous prime is 566720213. The next prime is 566720249. The reversal of 566720231 is 132027665.

It is an interprime number because it is at equal distance from previous prime (566720213) and next prime (566720249).

It is a de Polignac number, because none of the positive numbers 2^k-566720231 is a prime.

It is a super-2 number, since 2×566720231² = 642343640449386722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566720251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3130961 + ... + 3131141.

It is an arithmetic number, because the mean of its divisors is an integer number (15571374).

Almost surely, 2^566720231 is an apocalyptic number.

566720231 is a deficient number, since it is larger than the sum of its proper divisors (180705721).

566720231 is a wasteful number, since it uses less digits than its factorization.

566720231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 566720231 is about 23805.8864779281. The cubic root of 566720231 is about 827.5410997497.

Adding to 566720231 its reverse (132027665), we get a palindrome (698747896).

The spelling of 566720231 in words is "five hundred sixty-six million, seven hundred twenty thousand, two hundred thirty-one".