56245661 has 4 divisors (see below), whose sum is σ = 57765852. Its totient is φ = 54725472.

The previous prime is 56245619. The next prime is 56245669. The reversal of 56245661 is 16654265.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32137561 + 24108100 = 5669^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 56245661 - 2¹⁸ = 55983517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56245669) 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, 760040 + ... + 760113.

It is an arithmetic number, because the mean of its divisors is an integer number (14441463).

Almost surely, 2^56245661 is an apocalyptic number.

It is an amenable number.

56245661 is a deficient number, since it is larger than the sum of its proper divisors (1520191).

56245661 is a wasteful number, since it uses less digits than its factorization.

56245661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520190.

The product of its digits is 43200, while the sum is 35.

The square root of 56245661 is about 7499.7107277548. The cubic root of 56245661 is about 383.1448640423.

The spelling of 56245661 in words is "fifty-six million, two hundred forty-five thousand, six hundred sixty-one".