55481895 has 32 divisors (see below), whose sum is σ = 112727040. Its totient is φ = 25362720.

The previous prime is 55481893. The next prime is 55481927. The reversal of 55481895 is 59818455.

It is a happy number.

55481895 is a `hidden beast` number, since 5 + 548 + 18 + 95 = 666.

It is not a de Polignac number, because 55481895 - 2¹ = 55481893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55481895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55481893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28411 + ... + 30300.

It is an arithmetic number, because the mean of its divisors is an integer number (3522720).

Almost surely, 2^55481895 is an apocalyptic number.

55481895 is an abundant number, since it is smaller than the sum of its proper divisors (57245145).

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

55481895 is a wasteful number, since it uses less digits than its factorization.

55481895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58732 (or 58726 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 55481895 is about 7448.6169857229. The cubic root of 55481895 is about 381.4026990224.

The spelling of 55481895 in words is "fifty-five million, four hundred eighty-one thousand, eight hundred ninety-five".