55038691 has 8 divisors (see below), whose sum is σ = 56206080. Its totient is φ = 53881608.

The previous prime is 55038677. The next prime is 55038719. The reversal of 55038691 is 19683055.

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 55038691 - 2²³ = 46650083 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 55038691.

It is not an unprimeable number, because it can be changed into a prime (55030691) 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, 8730 + ... + 13648.

It is an arithmetic number, because the mean of its divisors is an integer number (7025760).

Almost surely, 2^55038691 is an apocalyptic number.

55038691 is a deficient number, since it is larger than the sum of its proper divisors (1167389).

55038691 is a wasteful number, since it uses less digits than its factorization.

55038691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 55038691 is about 7418.8065751844. The cubic root of 55038691 is about 380.3844009514.

The spelling of 55038691 in words is "fifty-five million, thirty-eight thousand, six hundred ninety-one".