56217554 has 4 divisors (see below), whose sum is σ = 84326334. Its totient is φ = 28108776.

The previous prime is 56217529. The next prime is 56217563. The reversal of 56217554 is 45571265.

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

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 5166529 = 7145^2 + 2273^2 .

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14054387 + ... + 14054390.

Almost surely, 2^56217554 is an apocalyptic number.

56217554 is a deficient number, since it is larger than the sum of its proper divisors (28108780).

56217554 is a wasteful number, since it uses less digits than its factorization.

56217554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28108779.

The product of its digits is 42000, while the sum is 35.

The square root of 56217554 is about 7497.8366213195. The cubic root of 56217554 is about 383.0810318768.

The spelling of 56217554 in words is "fifty-six million, two hundred seventeen thousand, five hundred fifty-four".