55271808 has 96 divisors (see below), whose sum is σ = 165033960. Its totient is φ = 18413568.

The previous prime is 55271807. The next prime is 55271809. The reversal of 55271808 is 80817255.

It is an interprime number because it is at equal distance from previous prime (55271807) and next prime (55271809).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 30216 + ... + 31992.

Almost surely, 2^55271808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55271808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82516980).

55271808 is an abundant number, since it is smaller than the sum of its proper divisors (109762152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55271808 is an equidigital number, since it uses as much as digits as its factorization.

55271808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 55271808 is about 7434.5011937587. The cubic root of 55271808 is about 380.9206853312.

The spelling of 55271808 in words is "fifty-five million, two hundred seventy-one thousand, eight hundred eight".