56555501 has 4 divisors (see below), whose sum is σ = 58379904. Its totient is φ = 54731100.

The previous prime is 56555491. The next prime is 56555503. The reversal of 56555501 is 10555565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56555501 is a prime.

It is a super-2 number, since 2×56555501² = 6397049386722002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56555503) 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, 912155 + ... + 912216.

It is an arithmetic number, because the mean of its divisors is an integer number (14594976).

Almost surely, 2^56555501 is an apocalyptic number.

It is an amenable number.

56555501 is a deficient number, since it is larger than the sum of its proper divisors (1824403).

56555501 is a wasteful number, since it uses less digits than its factorization.

56555501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824402.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 56555501 is about 7520.3391545860. The cubic root of 56555501 is about 383.8471184130.

The spelling of 56555501 in words is "fifty-six million, five hundred fifty-five thousand, five hundred one".