55902281 has 2 divisors, whose sum is σ = 55902282. Its totient is φ = 55902280.

The previous prime is 55902277. The next prime is 55902283. The reversal of 55902281 is 18220955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44342281 + 11560000 = 6659^2 + 3400^2 .

It is a cyclic number.

It is not a de Polignac number, because 55902281 - 2² = 55902277 is a prime.

It is a super-2 number, since 2×55902281² = 6250130042005922, which contains 22 as substring.

Together with 55902283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55902283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27951140 + 27951141.

It is an arithmetic number, because the mean of its divisors is an integer number (27951141).

Almost surely, 2^55902281 is an apocalyptic number.

It is an amenable number.

55902281 is a deficient number, since it is larger than the sum of its proper divisors (1).

55902281 is an equidigital number, since it uses as much as digits as its factorization.

55902281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 55902281 is about 7476.7827974337. The cubic root of 55902281 is about 382.3635716051.

The spelling of 55902281 in words is "fifty-five million, nine hundred two thousand, two hundred eighty-one".