55172259 has 40 divisors (see below), whose sum is σ = 88339680. Its totient is φ = 34193664.

The previous prime is 55172233. The next prime is 55172267. The reversal of 55172259 is 95227155.

It is not a de Polignac number, because 55172259 - 2⁸ = 55172003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55172269) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 141637 + ... + 142025.

It is an arithmetic number, because the mean of its divisors is an integer number (2208492).

Almost surely, 2^55172259 is an apocalyptic number.

55172259 is a deficient number, since it is larger than the sum of its proper divisors (33167421).

55172259 is a wasteful number, since it uses less digits than its factorization.

55172259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 512 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 55172259 is about 7427.8031072451. The cubic root of 55172259 is about 380.6918582353.

It can be divided in two parts, 5517 and 2259, that added together give a 5-th power (7776 = 6⁵).

The spelling of 55172259 in words is "fifty-five million, one hundred seventy-two thousand, two hundred fifty-nine".