55049919 has 8 divisors (see below), whose sum is σ = 73886592. Its totient is φ = 36456600.

The previous prime is 55049909. The next prime is 55049923. The reversal of 55049919 is 91994055.

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 55049919 - 2⁵ = 55049887 is a prime.

It is a super-2 number, since 2×55049919² = 6060987163813122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55049909) 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, 60309 + ... + 61214.

It is an arithmetic number, because the mean of its divisors is an integer number (9235824).

Almost surely, 2^55049919 is an apocalyptic number.

55049919 is a deficient number, since it is larger than the sum of its proper divisors (18836673).

55049919 is a wasteful number, since it uses less digits than its factorization.

55049919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121677.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 55049919 is about 7419.5632620795. The cubic root of 55049919 is about 380.4102655785.

The spelling of 55049919 in words is "fifty-five million, forty-nine thousand, nine hundred nineteen".