55588391 has 4 divisors (see below), whose sum is σ = 55614552. Its totient is φ = 55562232.

The previous prime is 55588387. The next prime is 55588483. The reversal of 55588391 is 19388555.

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 55588391 - 2² = 55588387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55588381) 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, 9581 + ... + 14246.

It is an arithmetic number, because the mean of its divisors is an integer number (13903638).

Almost surely, 2^55588391 is an apocalyptic number.

55588391 is a deficient number, since it is larger than the sum of its proper divisors (26161).

55588391 is a wasteful number, since it uses less digits than its factorization.

55588391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26160.

The product of its digits is 216000, while the sum is 44.

The square root of 55588391 is about 7455.7622682057. The cubic root of 55588391 is about 381.6465737808.

The spelling of 55588391 in words is "fifty-five million, five hundred eighty-eight thousand, three hundred ninety-one".