55819885 has 8 divisors (see below), whose sum is σ = 73073376. Its totient is φ = 40596240.

The previous prime is 55819859. The next prime is 55819889. The reversal of 55819885 is 58891855.

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

It is a de Polignac number, because none of the positive numbers 2^k-55819885 is a prime.

It is a super-2 number, since 2×55819885² = 6231719122826450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55819889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507399 + ... + 507508.

It is an arithmetic number, because the mean of its divisors is an integer number (9134172).

Almost surely, 2^55819885 is an apocalyptic number.

55819885 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55819885 is a deficient number, since it is larger than the sum of its proper divisors (17253491).

55819885 is a wasteful number, since it uses less digits than its factorization.

55819885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014923.

The product of its digits is 576000, while the sum is 49.

The square root of 55819885 is about 7471.2706415977. The cubic root of 55819885 is about 382.1756202980.

The spelling of 55819885 in words is "fifty-five million, eight hundred nineteen thousand, eight hundred eighty-five".