55903299472021 has 2 divisors, whose sum is σ = 55903299472022. Its totient is φ = 55903299472020.

The previous prime is 55903299471949. The next prime is 55903299472037. The reversal of 55903299472021 is 12027499230955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53885803083025 + 2017496388996 = 7340695^2 + 1420386^2 .

It is a cyclic number.

It is not a de Polignac number, because 55903299472021 - 2⁷ = 55903299471893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55903299472051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27951649736010 + 27951649736011.

It is an arithmetic number, because the mean of its divisors is an integer number (27951649736011).

Almost surely, 2^{55903299472021} is an apocalyptic number.

It is an amenable number.

55903299472021 is a deficient number, since it is larger than the sum of its proper divisors (1).

55903299472021 is an equidigital number, since it uses as much as digits as its factorization.

55903299472021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 58.

The spelling of 55903299472021 in words is "fifty-five trillion, nine hundred three billion, two hundred ninety-nine million, four hundred seventy-two thousand, twenty-one".