56551545 has 24 divisors (see below), whose sum is σ = 98748936. Its totient is φ = 29937408.

The previous prime is 56551529. The next prime is 56551553. The reversal of 56551545 is 54515565.

56551545 is a `hidden beast` number, since 5 + 65 + 51 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 166464 + 56385081 = 408^2 + 7509^2 .

It is not a de Polignac number, because 56551545 - 2⁴ = 56551529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1579 + ... + 10751.

It is an arithmetic number, because the mean of its divisors is an integer number (4114539).

Almost surely, 2^56551545 is an apocalyptic number.

It is an amenable number.

56551545 is a deficient number, since it is larger than the sum of its proper divisors (42197391).

56551545 is a wasteful number, since it uses less digits than its factorization.

56551545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321 (or 9318 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 56551545 is about 7520.0761299338. The cubic root of 56551545 is about 383.8381682986.

The spelling of 56551545 in words is "fifty-six million, five hundred fifty-one thousand, five hundred forty-five".