56542861 has 4 divisors (see below), whose sum is σ = 56600572. Its totient is φ = 56485152.

The previous prime is 56542823. The next prime is 56542873. The reversal of 56542861 is 16824565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16824565 = 5 ⋅3364913.

It can be written as a sum of positive squares in 2 ways, for example, as 43626025 + 12916836 = 6605^2 + 3594^2 .

It is a cyclic number.

It is not a de Polignac number, because 56542861 - 2¹⁵ = 56510093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56542861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56542961) 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, 27360 + ... + 29353.

It is an arithmetic number, because the mean of its divisors is an integer number (14150143).

Almost surely, 2^56542861 is an apocalyptic number.

It is an amenable number.

56542861 is a deficient number, since it is larger than the sum of its proper divisors (57711).

56542861 is an equidigital number, since it uses as much as digits as its factorization.

56542861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57710.

The product of its digits is 57600, while the sum is 37.

The square root of 56542861 is about 7519.4987199946. The cubic root of 56542861 is about 383.8185200215.

It can be divided in two parts, 5654 and 2861, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 56542861 in words is "fifty-six million, five hundred forty-two thousand, eight hundred sixty-one".