55031385 has 8 divisors (see below), whose sum is σ = 88050240. Its totient is φ = 29350064.

The previous prime is 55031377. The next prime is 55031399. The reversal of 55031385 is 58313055.

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 55031385 - 2³ = 55031377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1834365 + ... + 1834394.

It is an arithmetic number, because the mean of its divisors is an integer number (11006280).

Almost surely, 2^55031385 is an apocalyptic number.

It is an amenable number.

55031385 is a deficient number, since it is larger than the sum of its proper divisors (33018855).

55031385 is a wasteful number, since it uses less digits than its factorization.

55031385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668767.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55031385 is about 7418.3141615868. The cubic root of 55031385 is about 380.3675690866.

The spelling of 55031385 in words is "fifty-five million, thirty-one thousand, three hundred eighty-five".