55901 has 2 divisors, whose sum is σ = 55902. Its totient is φ = 55900.

The previous prime is 55897. The next prime is 55903. The reversal of 55901 is 10955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55225 + 676 = 235^2 + 26^2 .

It is a cyclic number.

It is not a de Polignac number, because 55901 - 2² = 55897 is a prime.

Together with 55903, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27950 + 27951.

It is an arithmetic number, because the mean of its divisors is an integer number (27951).

2⁵⁵⁹⁰¹ is an apocalyptic number.

It is an amenable number.

55901 is a deficient number, since it is larger than the sum of its proper divisors (1).

55901 is an equidigital number, since it uses as much as digits as its factorization.

55901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 55901 is about 236.4339231160. The cubic root of 55901 is about 38.2360650964.

The spelling of 55901 in words is "fifty-five thousand, nine hundred one".