56542251 has 8 divisors (see below), whose sum is σ = 75424720. Its totient is φ = 37677312.

The previous prime is 56542249. The next prime is 56542259. The reversal of 56542251 is 15224565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56542251 - 2¹ = 56542249 is a prime.

It is a super-2 number, since 2×56542251² = 6394052296294002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56542259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8895 + ... + 13863.

It is an arithmetic number, because the mean of its divisors is an integer number (9428090).

Almost surely, 2^56542251 is an apocalyptic number.

56542251 is a deficient number, since it is larger than the sum of its proper divisors (18882469).

56542251 is a wasteful number, since it uses less digits than its factorization.

56542251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8765.

The product of its digits is 12000, while the sum is 30.

The square root of 56542251 is about 7519.4581586707. The cubic root of 56542251 is about 383.8171397698.

The spelling of 56542251 in words is "fifty-six million, five hundred forty-two thousand, two hundred fifty-one".