131056569 has 16 divisors (see below), whose sum is σ = 221895040. Its totient is φ = 74889360.

The previous prime is 131056517. The next prime is 131056577. The reversal of 131056569 is 965650131.

131056569 is a `hidden beast` number, since 1 + 31 + 0 + 565 + 69 = 666.

It is not a de Polignac number, because 131056569 - 2⁷ = 131056441 is a prime.

It is a super-2 number, since 2×131056569² = 34351648556103522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131056579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346522 + ... + 346899.

It is an arithmetic number, because the mean of its divisors is an integer number (13868440).

Almost surely, 2^131056569 is an apocalyptic number.

It is an amenable number.

131056569 is a deficient number, since it is larger than the sum of its proper divisors (90838471).

131056569 is an equidigital number, since it uses as much as digits as its factorization.

131056569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693437 (or 693431 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 131056569 is about 11447.9941037721. The cubic root of 131056569 is about 507.9484016144.

The spelling of 131056569 in words is "one hundred thirty-one million, fifty-six thousand, five hundred sixty-nine".