5566651231 has 4 divisors (see below), whose sum is σ = 5590542672. Its totient is φ = 5542759792.

The previous prime is 5566651177. The next prime is 5566651243. The reversal of 5566651231 is 1321566655.

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-5566651231 is a prime.

It is a super-2 number, since 2×5566651231² = 61975211855187630722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5566654231) 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, 11945371 + ... + 11945836.

It is an arithmetic number, because the mean of its divisors is an integer number (1397635668).

Almost surely, 2^5566651231 is an apocalyptic number.

5566651231 is a deficient number, since it is larger than the sum of its proper divisors (23891441).

5566651231 is a wasteful number, since it uses less digits than its factorization.

5566651231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23891440.

The product of its digits is 162000, while the sum is 40.

The square root of 5566651231 is about 74609.9941763836. The cubic root of 5566651231 is about 1772.2759226644.

The spelling of 5566651231 in words is "five billion, five hundred sixty-six million, six hundred fifty-one thousand, two hundred thirty-one".