55524422621 has 2 divisors, whose sum is σ = 55524422622. Its totient is φ = 55524422620.

The previous prime is 55524422599. The next prime is 55524422641. The reversal of 55524422621 is 12622442555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39852136900 + 15672285721 = 199630^2 + 125189^2 .

It is a cyclic number.

It is not a de Polignac number, because 55524422621 - 2⁶ = 55524422557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55524422641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27762211310 + 27762211311.

It is an arithmetic number, because the mean of its divisors is an integer number (27762211311).

Almost surely, 2^55524422621 is an apocalyptic number.

It is an amenable number.

55524422621 is a deficient number, since it is larger than the sum of its proper divisors (1).

55524422621 is an equidigital number, since it uses as much as digits as its factorization.

55524422621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 38.

The spelling of 55524422621 in words is "fifty-five billion, five hundred twenty-four million, four hundred twenty-two thousand, six hundred twenty-one".