55284881 has 4 divisors (see below), whose sum is σ = 55637172. Its totient is φ = 54932592.

The previous prime is 55284869. The next prime is 55284907. The reversal of 55284881 is 18848255.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18848255 = 5 ⋅3769651.

It can be written as a sum of positive squares in 2 ways, for example, as 40844881 + 14440000 = 6391^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 55284881 - 2¹⁰ = 55283857 is a prime.

It is a super-2 number, since 2×55284881² = 6112836134368322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55284781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175910 + ... + 176223.

It is an arithmetic number, because the mean of its divisors is an integer number (13909293).

Almost surely, 2^55284881 is an apocalyptic number.

It is an amenable number.

55284881 is a deficient number, since it is larger than the sum of its proper divisors (352291).

55284881 is a wasteful number, since it uses less digits than its factorization.

55284881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352290.

The product of its digits is 102400, while the sum is 41.

The square root of 55284881 is about 7435.3803534184. The cubic root of 55284881 is about 380.9507150078.

It can be divided in two parts, 55284 and 881, that added together give a palindrome (56165).

The spelling of 55284881 in words is "fifty-five million, two hundred eighty-four thousand, eight hundred eighty-one".