56651 has 4 divisors (see below), whose sum is σ = 64752. Its totient is φ = 48552.

The previous prime is 56633. The next prime is 56659. The reversal of 56651 is 15665.

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

It is a de Polignac number, because none of the positive numbers 2^k-56651 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 56651.

It is not an unprimeable number, because it can be changed into a prime (56659) 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, 4040 + ... + 4053.

It is an arithmetic number, because the mean of its divisors is an integer number (16188).

2⁵⁶⁶⁵¹ is an apocalyptic number.

56651 is a deficient number, since it is larger than the sum of its proper divisors (8101).

56651 is an equidigital number, since it uses as much as digits as its factorization.

56651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100.

The product of its digits is 900, while the sum is 23.

The square root of 56651 is about 238.0147054280. The cubic root of 56651 is about 38.4063050266.

It can be divided in two parts, 56 and 651, that added together give a palindrome (707).

The spelling of 56651 in words is "fifty-six thousand, six hundred fifty-one".