55271817 has 24 divisors (see below), whose sum is σ = 84427200. Its totient is φ = 34747488.

The previous prime is 55271809. The next prime is 55271831. The reversal of 55271817 is 71817255.

It is not a de Polignac number, because 55271817 - 2³ = 55271809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55271807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44359 + ... + 45587.

It is an arithmetic number, because the mean of its divisors is an integer number (3517800).

Almost surely, 2^55271817 is an apocalyptic number.

55271817 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55271817 is a deficient number, since it is larger than the sum of its proper divisors (29155383).

55271817 is a wasteful number, since it uses less digits than its factorization.

55271817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1514 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 55271817 is about 7434.5017990448. The cubic root of 55271817 is about 380.9207060065.

The spelling of 55271817 in words is "fifty-five million, two hundred seventy-one thousand, eight hundred seventeen".