55553081 has 2 divisors, whose sum is σ = 55553082. Its totient is φ = 55553080.

The previous prime is 55553053. The next prime is 55553083. The reversal of 55553081 is 18035555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53421481 + 2131600 = 7309^2 + 1460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55553081 is a prime.

It is a super-2 number, since 2×55553081² = 6172289617185122, which contains 22 as substring.

Together with 55553083, 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 (55553083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776540 + 27776541.

It is an arithmetic number, because the mean of its divisors is an integer number (27776541).

Almost surely, 2^55553081 is an apocalyptic number.

It is an amenable number.

55553081 is a deficient number, since it is larger than the sum of its proper divisors (1).

55553081 is an equidigital number, since it uses as much as digits as its factorization.

55553081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 55553081 is about 7453.3939249177. The cubic root of 55553081 is about 381.5657487824.

The spelling of 55553081 in words is "fifty-five million, five hundred fifty-three thousand, eighty-one".