55204155 has 24 divisors (see below), whose sum is σ = 96681312. Its totient is φ = 29136384.

The previous prime is 55204153. The next prime is 55204159. The reversal of 55204155 is 55140255.

It is not a de Polignac number, because 55204155 - 2¹ = 55204153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55204153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1959 + ... + 10688.

It is an arithmetic number, because the mean of its divisors is an integer number (4028388).

Almost surely, 2^55204155 is an apocalyptic number.

55204155 is a deficient number, since it is larger than the sum of its proper divisors (41477157).

55204155 is a wasteful number, since it uses less digits than its factorization.

55204155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12755 (or 12752 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 55204155 is about 7429.9498652414. The cubic root of 55204155 is about 380.7652055330.

Subtracting from 55204155 its product of nonzero digits (5000), we obtain a palindrome (55199155).

The spelling of 55204155 in words is "fifty-five million, two hundred four thousand, one hundred fifty-five".