55688291 has 4 divisors (see below), whose sum is σ = 57046584. Its totient is φ = 54330000.

The previous prime is 55688287. The next prime is 55688309. The reversal of 55688291 is 19288655.

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

It is a cyclic number.

It is not a de Polignac number, because 55688291 - 2² = 55688287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55688261) 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, 679085 + ... + 679166.

It is an arithmetic number, because the mean of its divisors is an integer number (14261646).

Almost surely, 2^55688291 is an apocalyptic number.

55688291 is a deficient number, since it is larger than the sum of its proper divisors (1358293).

55688291 is a wasteful number, since it uses less digits than its factorization.

55688291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358292.

The product of its digits is 172800, while the sum is 44.

The square root of 55688291 is about 7462.4587771056. The cubic root of 55688291 is about 381.8750607922.

The spelling of 55688291 in words is "fifty-five million, six hundred eighty-eight thousand, two hundred ninety-one".