56143761 has 4 divisors (see below), whose sum is σ = 74858352. Its totient is φ = 37429172.

The previous prime is 56143757. The next prime is 56143777. The reversal of 56143761 is 16734165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56143761 - 2² = 56143757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56143721) 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, 9357291 + ... + 9357296.

It is an arithmetic number, because the mean of its divisors is an integer number (18714588).

Almost surely, 2^56143761 is an apocalyptic number.

It is an amenable number.

56143761 is a deficient number, since it is larger than the sum of its proper divisors (18714591).

56143761 is a wasteful number, since it uses less digits than its factorization.

56143761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18714590.

The product of its digits is 15120, while the sum is 33.

The square root of 56143761 is about 7492.9140526233. The cubic root of 56143761 is about 382.9133435873.

The spelling of 56143761 in words is "fifty-six million, one hundred forty-three thousand, seven hundred sixty-one".