75656131 has 4 divisors (see below), whose sum is σ = 78945552. Its totient is φ = 72366712.

The previous prime is 75656123. The next prime is 75656143. The reversal of 75656131 is 13165657.

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

It is a cyclic number.

It is not a de Polignac number, because 75656131 - 2³ = 75656123 is a prime.

It is a super-2 number, since 2×75656131² = 11447700315778322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75656101) 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, 1644676 + ... + 1644721.

It is an arithmetic number, because the mean of its divisors is an integer number (19736388).

Almost surely, 2^75656131 is an apocalyptic number.

75656131 is a deficient number, since it is larger than the sum of its proper divisors (3289421).

75656131 is a wasteful number, since it uses less digits than its factorization.

75656131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289420.

The product of its digits is 18900, while the sum is 34.

The square root of 75656131 is about 8698.0532879490. The cubic root of 75656131 is about 422.9425466924.

The spelling of 75656131 in words is "seventy-five million, six hundred fifty-six thousand, one hundred thirty-one".