55958919 has 4 divisors (see below), whose sum is σ = 74611896. Its totient is φ = 37305944.

The previous prime is 55958897. The next prime is 55958921. The reversal of 55958919 is 91985955.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55958919 - 2⁸ = 55958663 is a prime.

It is a super-2 number, since 2×55958919² = 6262801231297122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55998919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9326484 + ... + 9326489.

It is an arithmetic number, because the mean of its divisors is an integer number (18652974).

Almost surely, 2^55958919 is an apocalyptic number.

55958919 is a deficient number, since it is larger than the sum of its proper divisors (18652977).

55958919 is a wasteful number, since it uses less digits than its factorization.

55958919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18652976.

The product of its digits is 729000, while the sum is 51.

The square root of 55958919 is about 7480.5694301971. The cubic root of 55958919 is about 382.4926599471.

The spelling of 55958919 in words is "fifty-five million, nine hundred fifty-eight thousand, nine hundred nineteen".