56501 has 2 divisors, whose sum is σ = 56502. Its totient is φ = 56500.

The previous prime is 56489. The next prime is 56503. The reversal of 56501 is 10565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39601 + 16900 = 199^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 56501 - 2⁶ = 56437 is a prime.

Together with 56503, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 56501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28250 + 28251.

It is an arithmetic number, because the mean of its divisors is an integer number (28251).

2⁵⁶⁵⁰¹ is an apocalyptic number.

It is an amenable number.

56501 is a deficient number, since it is larger than the sum of its proper divisors (1).

56501 is an equidigital number, since it uses as much as digits as its factorization.

56501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 56501 is about 237.6993899866. The cubic root of 56501 is about 38.3723777771.

The spelling of 56501 in words is "fifty-six thousand, five hundred one".