55125881 has 4 divisors (see below), whose sum is σ = 55141200. Its totient is φ = 55110564.

The previous prime is 55125869. The next prime is 55125887. The reversal of 55125881 is 18852155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 55125881 - 2¹⁴ = 55109497 is a prime.

It is a super-2 number, since 2×55125881² = 6077725512052322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55125887) 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, 1010 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (13785300).

Almost surely, 2^55125881 is an apocalyptic number.

It is an amenable number.

55125881 is a deficient number, since it is larger than the sum of its proper divisors (15319).

55125881 is an equidigital number, since it uses as much as digits as its factorization.

55125881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15318.

The product of its digits is 16000, while the sum is 35.

The square root of 55125881 is about 7424.6805318478. The cubic root of 55125881 is about 380.5851580156.

The spelling of 55125881 in words is "fifty-five million, one hundred twenty-five thousand, eight hundred eighty-one".