55266881 has 4 divisors (see below), whose sum is σ = 58517892. Its totient is φ = 52015872.

The previous prime is 55266859. The next prime is 55266889. The reversal of 55266881 is 18866255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37761025 + 17505856 = 6145^2 + 4184^2 .

It is a cyclic number.

It is not a de Polignac number, because 55266881 - 2¹⁰ = 55265857 is a prime.

It is a super-2 number, since 2×55266881² = 6108856270936322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55266889) 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, 1625480 + ... + 1625513.

It is an arithmetic number, because the mean of its divisors is an integer number (14629473).

Almost surely, 2^55266881 is an apocalyptic number.

It is an amenable number.

55266881 is a deficient number, since it is larger than the sum of its proper divisors (3251011).

55266881 is a wasteful number, since it uses less digits than its factorization.

55266881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251010.

The product of its digits is 115200, while the sum is 41.

The square root of 55266881 is about 7434.1698258783. The cubic root of 55266881 is about 380.9093664084.

The spelling of 55266881 in words is "fifty-five million, two hundred sixty-six thousand, eight hundred eighty-one".