55054557 has 24 divisors (see below), whose sum is σ = 84503640. Its totient is φ = 34473600.

The previous prime is 55054553. The next prime is 55054561. The reversal of 55054557 is 75545055.

It is a happy number.

55054557 is a `hidden beast` number, since 5 + 50 + 54 + 557 = 666.

It is an interprime number because it is at equal distance from previous prime (55054553) and next prime (55054561).

It can be written as a sum of positive squares in 4 ways, for example, as 29713401 + 25341156 = 5451^2 + 5034^2 .

It is not a de Polignac number, because 55054557 - 2² = 55054553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55054553) 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 in 23 ways as a sum of consecutive naturals, for example, 6807 + ... + 12507.

It is an arithmetic number, because the mean of its divisors is an integer number (3520985).

Almost surely, 2^55054557 is an apocalyptic number.

It is an amenable number.

55054557 is a deficient number, since it is larger than the sum of its proper divisors (29449083).

55054557 is a wasteful number, since it uses less digits than its factorization.

55054557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773 (or 5770 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The square root of 55054557 is about 7419.8758075860. The cubic root of 55054557 is about 380.4209485689.

It can be divided in two parts, 55054 and 557, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 55054557 in words is "fifty-five million, fifty-four thousand, five hundred fifty-seven".