55100557 has 2 divisors, whose sum is σ = 55100558. Its totient is φ = 55100556.

The previous prime is 55100537. The next prime is 55100561. The reversal of 55100557 is 75500155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50893956 + 4206601 = 7134^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 55100557 - 2⁷ = 55100429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55100537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27550278 + 27550279.

It is an arithmetic number, because the mean of its divisors is an integer number (27550279).

Almost surely, 2^55100557 is an apocalyptic number.

It is an amenable number.

55100557 is a deficient number, since it is larger than the sum of its proper divisors (1).

55100557 is an equidigital number, since it uses as much as digits as its factorization.

55100557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4375, while the sum is 28.

The square root of 55100557 is about 7422.9749427032. The cubic root of 55100557 is about 380.5268707248.

The spelling of 55100557 in words is "fifty-five million, one hundred thousand, five hundred fifty-seven".