55484557 has 2 divisors, whose sum is σ = 55484558. Its totient is φ = 55484556.

The previous prime is 55484551. The next prime is 55484573. The reversal of 55484557 is 75548455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49477156 + 6007401 = 7034^2 + 2451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55484557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55484551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27742278 + 27742279.

It is an arithmetic number, because the mean of its divisors is an integer number (27742279).

Almost surely, 2^55484557 is an apocalyptic number.

It is an amenable number.

55484557 is a deficient number, since it is larger than the sum of its proper divisors (1).

55484557 is an equidigital number, since it uses as much as digits as its factorization.

55484557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560000, while the sum is 43.

The square root of 55484557 is about 7448.7956744698. The cubic root of 55484557 is about 381.4087987765.

The spelling of 55484557 in words is "fifty-five million, four hundred eighty-four thousand, five hundred fifty-seven".