55544569 has 2 divisors, whose sum is σ = 55544570. Its totient is φ = 55544568.

The previous prime is 55544561. The next prime is 55544603. The reversal of 55544569 is 96544555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 190969 = 7440^2 + 437^2 .

It is a cyclic number.

It is not a de Polignac number, because 55544569 - 2³ = 55544561 is a prime.

It is a super-2 number, since 2×55544569² = 6170398290791522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55544561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27772284 + 27772285.

It is an arithmetic number, because the mean of its divisors is an integer number (27772285).

Almost surely, 2^55544569 is an apocalyptic number.

It is an amenable number.

55544569 is a deficient number, since it is larger than the sum of its proper divisors (1).

55544569 is an equidigital number, since it uses as much as digits as its factorization.

55544569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540000, while the sum is 43.

The square root of 55544569 is about 7452.8228880069. The cubic root of 55544569 is about 381.5462595930.

The spelling of 55544569 in words is "fifty-five million, five hundred forty-four thousand, five hundred sixty-nine".