55205055 has 12 divisors (see below), whose sum is σ = 95688840. Its totient is φ = 29442672.

The previous prime is 55205053. The next prime is 55205057. The reversal of 55205055 is 55050255.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55205053) and next prime (55205057).

It is not a de Polignac number, because 55205055 - 2¹ = 55205053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613345 + ... + 613434.

It is an arithmetic number, because the mean of its divisors is an integer number (7974070).

Almost surely, 2^55205055 is an apocalyptic number.

55205055 is a deficient number, since it is larger than the sum of its proper divisors (40483785).

55205055 is a wasteful number, since it uses less digits than its factorization.

55205055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226790 (or 1226787 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

The square root of 55205055 is about 7430.0104306791. The cubic root of 55205055 is about 380.7672747421.

The spelling of 55205055 in words is "fifty-five million, two hundred five thousand, fifty-five".