55881331 has 8 divisors (see below), whose sum is σ = 61820928. Its totient is φ = 50085000.

The previous prime is 55881317. The next prime is 55881367. The reversal of 55881331 is 13318855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55881331 - 2²¹ = 53784179 is a prime.

It is a super-2 number, since 2×55881331² = 6245446308663122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55881391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34995 + ... + 36556.

It is an arithmetic number, because the mean of its divisors is an integer number (7727616).

Almost surely, 2^55881331 is an apocalyptic number.

55881331 is a deficient number, since it is larger than the sum of its proper divisors (5939597).

55881331 is a wasteful number, since it uses less digits than its factorization.

55881331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71633.

The product of its digits is 14400, while the sum is 34.

The square root of 55881331 is about 7475.3816624972. The cubic root of 55881331 is about 382.3158006402.

The spelling of 55881331 in words is "fifty-five million, eight hundred eighty-one thousand, three hundred thirty-one".