55521923 has 2 divisors, whose sum is σ = 55521924. Its totient is φ = 55521922.

The previous prime is 55521887. The next prime is 55521943. The reversal of 55521923 is 32912555.

55521923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55521923 - 2⁶ = 55521859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55521923.

It is not a weakly prime, because it can be changed into another prime (55521943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760961 + 27760962.

It is an arithmetic number, because the mean of its divisors is an integer number (27760962).

Almost surely, 2^55521923 is an apocalyptic number.

55521923 is a deficient number, since it is larger than the sum of its proper divisors (1).

55521923 is an equidigital number, since it uses as much as digits as its factorization.

55521923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 32.

The square root of 55521923 is about 7451.3034430226. The cubic root of 55521923 is about 381.4943993104.

The spelling of 55521923 in words is "fifty-five million, five hundred twenty-one thousand, nine hundred twenty-three".