55758881 has 4 divisors (see below), whose sum is σ = 55785492. Its totient is φ = 55732272.

The previous prime is 55758869. The next prime is 55758883. The reversal of 55758881 is 18885755.

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 27040000 + 28718881 = 5200^2 + 5359^2 .

It is a cyclic number.

It is not a de Polignac number, because 55758881 - 2⁶ = 55758817 is a prime.

It is a super-2 number, since 2×55758881² = 6218105620744322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55758883) 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, 9866 + ... + 14451.

It is an arithmetic number, because the mean of its divisors is an integer number (13946373).

Almost surely, 2^55758881 is an apocalyptic number.

It is an amenable number.

55758881 is a deficient number, since it is larger than the sum of its proper divisors (26611).

55758881 is a wasteful number, since it uses less digits than its factorization.

55758881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26610.

The product of its digits is 448000, while the sum is 47.

The square root of 55758881 is about 7467.1869535991. The cubic root of 55758881 is about 382.0363465137.

The spelling of 55758881 in words is "fifty-five million, seven hundred fifty-eight thousand, eight hundred eighty-one".