56561143 has 8 divisors (see below), whose sum is σ = 58481280. Its totient is φ = 54647040.

The previous prime is 56561137. The next prime is 56561147. The reversal of 56561143 is 34116565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56561143 - 2⁹ = 56560631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25503 + ... + 27631.

It is an arithmetic number, because the mean of its divisors is an integer number (7310160).

Almost surely, 2^56561143 is an apocalyptic number.

56561143 is a deficient number, since it is larger than the sum of its proper divisors (1920137).

56561143 is a wasteful number, since it uses less digits than its factorization.

56561143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017.

The product of its digits is 10800, while the sum is 31.

The square root of 56561143 is about 7520.7142612919. The cubic root of 56561143 is about 383.8598822373.

The spelling of 56561143 in words is "fifty-six million, five hundred sixty-one thousand, one hundred forty-three".