55187839 has 8 divisors (see below), whose sum is σ = 63135360. Its totient is φ = 47256216.

The previous prime is 55187813. The next prime is 55187857. The reversal of 55187839 is 93878155.

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

It is not a de Polignac number, because 55187839 - 2¹³ = 55179647 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 (55187809) 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, 4752 + ... + 11530.

It is an arithmetic number, because the mean of its divisors is an integer number (7891920).

Almost surely, 2^55187839 is an apocalyptic number.

55187839 is a deficient number, since it is larger than the sum of its proper divisors (7947521).

55187839 is a wasteful number, since it uses less digits than its factorization.

55187839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7949.

The product of its digits is 302400, while the sum is 46.

The square root of 55187839 is about 7428.8517955334. The cubic root of 55187839 is about 380.7276891706.

The spelling of 55187839 in words is "fifty-five million, one hundred eighty-seven thousand, eight hundred thirty-nine".