55308019 has 16 divisors (see below), whose sum is σ = 61422592. Its totient is φ = 49478688.

The previous prime is 55307981. The next prime is 55308023. The reversal of 55308019 is 91080355.

It is a cyclic number.

It is not a de Polignac number, because 55308019 - 2⁷ = 55307891 is a prime.

It is a super-2 number, since 2×55308019² = 6117953931408722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55308059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90814 + ... + 91420.

It is an arithmetic number, because the mean of its divisors is an integer number (3838912).

Almost surely, 2^55308019 is an apocalyptic number.

55308019 is a deficient number, since it is larger than the sum of its proper divisors (6114573).

55308019 is a wasteful number, since it uses less digits than its factorization.

55308019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 55308019 is about 7436.9361298857. The cubic root of 55308019 is about 381.0038531539.

The spelling of 55308019 in words is "fifty-five million, three hundred eight thousand, nineteen".