55804155 has 16 divisors (see below), whose sum is σ = 97403904. Its totient is φ = 27056480.

The previous prime is 55804139. The next prime is 55804163. The reversal of 55804155 is 55140855.

It is not a de Polignac number, because 55804155 - 2⁴ = 55804139 is a prime.

It is a super-2 number, since 2×55804155² = 6228207430528050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168939 + ... + 169268.

It is an arithmetic number, because the mean of its divisors is an integer number (6087744).

Almost surely, 2^55804155 is an apocalyptic number.

55804155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55804155 is a deficient number, since it is larger than the sum of its proper divisors (41599749).

55804155 is a wasteful number, since it uses less digits than its factorization.

55804155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338226.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 55804155 is about 7470.2178683088. The cubic root of 55804155 is about 382.1397179949.

It can be divided in two parts, 558041 and 55, that added together give a triangular number (558096 = T₁₀₅₆).

The spelling of 55804155 in words is "fifty-five million, eight hundred four thousand, one hundred fifty-five".