55018573 has 2 divisors, whose sum is σ = 55018574. Its totient is φ = 55018572.

The previous prime is 55018549. The next prime is 55018631. The reversal of 55018573 is 37581055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42536484 + 12482089 = 6522^2 + 3533^2 .

It is a cyclic number.

It is not a de Polignac number, because 55018573 - 2⁵ = 55018541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55018673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27509286 + 27509287.

It is an arithmetic number, because the mean of its divisors is an integer number (27509287).

Almost surely, 2^55018573 is an apocalyptic number.

It is an amenable number.

55018573 is a deficient number, since it is larger than the sum of its proper divisors (1).

55018573 is an equidigital number, since it uses as much as digits as its factorization.

55018573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55018573 is about 7417.4505728046. The cubic root of 55018573 is about 380.3380486743.

The spelling of 55018573 in words is "fifty-five million, eighteen thousand, five hundred seventy-three".