55055919 has 8 divisors (see below), whose sum is σ = 73606192. Its totient is φ = 36604800.

The previous prime is 55055893. The next prime is 55055921. The reversal of 55055919 is 91955055.

It is a happy number.

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

It is not a de Polignac number, because 55055919 - 2¹⁵ = 55023151 is a prime.

It is a super-2 number, since 2×55055919² = 6062308433869122, 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 (55055999) 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, 23482 + ... + 25719.

It is an arithmetic number, because the mean of its divisors is an integer number (9200774).

Almost surely, 2^55055919 is an apocalyptic number.

55055919 is a deficient number, since it is larger than the sum of its proper divisors (18550273).

55055919 is a wasteful number, since it uses less digits than its factorization.

55055919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49577.

The product of its (nonzero) digits is 50625, while the sum is 39.

The square root of 55055919 is about 7419.9675875303. The cubic root of 55055919 is about 380.4240856332.

The spelling of 55055919 in words is "fifty-five million, fifty-five thousand, nine hundred nineteen".