55555573 has 2 divisors, whose sum is σ = 55555574. Its totient is φ = 55555572.

The previous prime is 55555559. The next prime is 55555579. The reversal of 55555573 is 37555555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33258289 + 22297284 = 5767^2 + 4722^2 .

It is a cyclic number.

It is not a de Polignac number, because 55555573 - 2⁹ = 55555061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777786 + 27777787.

It is an arithmetic number, because the mean of its divisors is an integer number (27777787).

Almost surely, 2^55555573 is an apocalyptic number.

It is an amenable number.

55555573 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555573 is an equidigital number, since it uses as much as digits as its factorization.

55555573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 328125, while the sum is 40.

The square root of 55555573 is about 7453.5610952081. The cubic root of 55555573 is about 381.5714541222.

The spelling of 55555573 in words is "fifty-five million, five hundred fifty-five thousand, five hundred seventy-three".