55145255 has 16 divisors (see below), whose sum is σ = 72344448. Its totient is φ = 40020000.

The previous prime is 55145213. The next prime is 55145291. The reversal of 55145255 is 55254155.

It is not a de Polignac number, because 55145255 - 2²⁴ = 38368039 is a prime.

It is a congruent number.

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, 37280 + ... + 38730.

It is an arithmetic number, because the mean of its divisors is an integer number (4521528).

Almost surely, 2^55145255 is an apocalyptic number.

55145255 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55145255 is a deficient number, since it is larger than the sum of its proper divisors (17199193).

55145255 is a wasteful number, since it uses less digits than its factorization.

55145255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

The product of its digits is 25000, while the sum is 32.

The square root of 55145255 is about 7425.9851198343. The cubic root of 55145255 is about 380.6297383656.

Subtracting 55145255 from its reverse (55254155), we obtain a square (108900 = 330²).

The spelling of 55145255 in words is "fifty-five million, one hundred forty-five thousand, two hundred fifty-five".