55143254 has 4 divisors (see below), whose sum is σ = 82714884. Its totient is φ = 27571626.

The previous prime is 55143247. The next prime is 55143281. The reversal of 55143254 is 45234155.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13785812 + ... + 13785815.

It is an arithmetic number, because the mean of its divisors is an integer number (20678721).

Almost surely, 2^55143254 is an apocalyptic number.

55143254 is a deficient number, since it is larger than the sum of its proper divisors (27571630).

55143254 is a wasteful number, since it uses less digits than its factorization.

55143254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27571629.

The product of its digits is 12000, while the sum is 29.

The square root of 55143254 is about 7425.8503890127. The cubic root of 55143254 is about 380.6251344681.

Subtracting from 55143254 its reverse (45234155), we obtain a palindrome (9909099).

The spelling of 55143254 in words is "fifty-five million, one hundred forty-three thousand, two hundred fifty-four".