55430055 has 32 divisors (see below), whose sum is σ = 99947520. Its totient is φ = 29141280.

The previous prime is 55430051. The next prime is 55430059. The reversal of 55430055 is 55003455.

It is an interprime number because it is at equal distance from previous prime (55430051) and next prime (55430059).

It is not a de Polignac number, because 55430055 - 2² = 55430051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55430051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6694 + ... + 12476.

It is an arithmetic number, because the mean of its divisors is an integer number (3123360).

Almost surely, 2^55430055 is an apocalyptic number.

55430055 is a deficient number, since it is larger than the sum of its proper divisors (44517465).

55430055 is a wasteful number, since it uses less digits than its factorization.

55430055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5868 (or 5862 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55430055 is about 7445.1363318612. The cubic root of 55430055 is about 381.2838730094.

The spelling of 55430055 in words is "fifty-five million, four hundred thirty thousand, fifty-five".