55642919 has 8 divisors (see below), whose sum is σ = 56782080. Its totient is φ = 54511200.

The previous prime is 55642901. The next prime is 55642927. The reversal of 55642919 is 91924655.

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 55642919 - 2²⁰ = 54594343 is a prime.

It is a super-2 number, since 2×55642919² = 6192268869681122, 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 (55642019) 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, 14714 + ... + 18104.

It is an arithmetic number, because the mean of its divisors is an integer number (7097760).

Almost surely, 2^55642919 is an apocalyptic number.

55642919 is a deficient number, since it is larger than the sum of its proper divisors (1139161).

55642919 is a wasteful number, since it uses less digits than its factorization.

55642919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721.

The product of its digits is 97200, while the sum is 41.

The square root of 55642919 is about 7459.4181408472. The cubic root of 55642919 is about 381.7713217916.

The spelling of 55642919 in words is "fifty-five million, six hundred forty-two thousand, nine hundred nineteen".