56551849 has 4 divisors (see below), whose sum is σ = 56730564. Its totient is φ = 56373136.

The previous prime is 56551823. The next prime is 56551861. The reversal of 56551849 is 94815565.

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 30470400 + 26081449 = 5520^2 + 5107^2 .

It is a cyclic number.

It is not a de Polignac number, because 56551849 - 2⁷ = 56551721 is a prime.

It is a super-2 number, since 2×56551849² = 6396223250637602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56551889) 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, 88882 + ... + 89515.

It is an arithmetic number, because the mean of its divisors is an integer number (14182641).

Almost surely, 2^56551849 is an apocalyptic number.

It is an amenable number.

56551849 is a deficient number, since it is larger than the sum of its proper divisors (178715).

56551849 is a wasteful number, since it uses less digits than its factorization.

56551849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178714.

The product of its digits is 216000, while the sum is 43.

The square root of 56551849 is about 7520.0963424680. The cubic root of 56551849 is about 383.8388560877.

The spelling of 56551849 in words is "fifty-six million, five hundred fifty-one thousand, eight hundred forty-nine".