55079919 has 10 divisors (see below), whose sum is σ = 82280000. Its totient is φ = 36719892.

The previous prime is 55079837. The next prime is 55079923. The reversal of 55079919 is 91997055.

55079919 is a `hidden beast` number, since 550 + 7 + 9 + 91 + 9 = 666.

It is not a de Polignac number, because 55079919 - 2⁸ = 55079663 is a prime.

It is a super-2 number, since 2×55079919² = 6067594954093122, 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 (55074919) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 339919 + ... + 340080.

It is an arithmetic number, because the mean of its divisors is an integer number (8228000).

Almost surely, 2^55079919 is an apocalyptic number.

55079919 is a deficient number, since it is larger than the sum of its proper divisors (27200081).

55079919 is an equidigital number, since it uses as much as digits as its factorization.

55079919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680011 (or 680002 counting only the distinct ones).

The product of its (nonzero) digits is 127575, while the sum is 45.

The square root of 55079919 is about 7421.5846690582. The cubic root of 55079919 is about 380.4793558134.

The spelling of 55079919 in words is "fifty-five million, seventy-nine thousand, nine hundred nineteen".