56615245 has 4 divisors (see below), whose sum is σ = 67938300. Its totient is φ = 45292192.

The previous prime is 56615243. The next prime is 56615257. The reversal of 56615245 is 54251665.

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 16305444 + 40309801 = 4038^2 + 6349^2 .

It is a cyclic number.

It is not a de Polignac number, because 56615245 - 2¹ = 56615243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56615245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56615243) 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, 5661520 + ... + 5661529.

It is an arithmetic number, because the mean of its divisors is an integer number (16984575).

Almost surely, 2^56615245 is an apocalyptic number.

It is an amenable number.

56615245 is a deficient number, since it is larger than the sum of its proper divisors (11323055).

56615245 is a wasteful number, since it uses less digits than its factorization.

56615245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323054.

The product of its digits is 36000, while the sum is 34.

The square root of 56615245 is about 7524.3102673933. The cubic root of 56615245 is about 383.9822334264.

The spelling of 56615245 in words is "fifty-six million, six hundred fifteen thousand, two hundred forty-five".