55143055 has 16 divisors (see below), whose sum is σ = 73553184. Its totient is φ = 39345280.

The previous prime is 55143041. The next prime is 55143059. The reversal of 55143055 is 55034155.

It is not a de Polignac number, because 55143055 - 2²³ = 46754447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6544 + ... + 12373.

It is an arithmetic number, because the mean of its divisors is an integer number (4597074).

Almost surely, 2^55143055 is an apocalyptic number.

55143055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55143055 is a deficient number, since it is larger than the sum of its proper divisors (18410129).

55143055 is a wasteful number, since it uses less digits than its factorization.

55143055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18986.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55143055 is about 7425.8369898618. The cubic root of 55143055 is about 380.6246766031.

Subtracting from 55143055 its reverse (55034155), we obtain a square (108900 = 330²).

It can be divided in two parts, 55 and 143055, that multiplied together give a square (7868025 = 2805²).

The spelling of 55143055 in words is "fifty-five million, one hundred forty-three thousand, fifty-five".