55881697 has 8 divisors (see below), whose sum is σ = 58388544. Its totient is φ = 53381328.

The previous prime is 55881689. The next prime is 55881701. The reversal of 55881697 is 79618855.

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 55881697 - 2³ = 55881689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55881697.

It is not an unprimeable number, because it can be changed into a prime (55881607) 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, 26898 + ... + 28900.

It is an arithmetic number, because the mean of its divisors is an integer number (7298568).

Almost surely, 2^55881697 is an apocalyptic number.

It is an amenable number.

55881697 is a deficient number, since it is larger than the sum of its proper divisors (2506847).

55881697 is a wasteful number, since it uses less digits than its factorization.

55881697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239.

The product of its digits is 604800, while the sum is 49.

The square root of 55881697 is about 7475.4061428126. The cubic root of 55881697 is about 382.3166353094.

It can be divided in two parts, 558 and 81697, that multiplied together give a triangular number (45586926 = T₉₅₄₈).

The spelling of 55881697 in words is "fifty-five million, eight hundred eighty-one thousand, six hundred ninety-seven".