55880019 has 18 divisors (see below), whose sum is σ = 87404460. Its totient is φ = 34386768.

The previous prime is 55879997. The next prime is 55880023. The reversal of 55880019 is 91008855.

55880019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55880019 - 2⁵ = 55879987 is a prime.

It is a super-2 number, since 2×55880019² = 6245153046880722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55884019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16849 + ... + 19890.

Almost surely, 2^55880019 is an apocalyptic number.

55880019 is a deficient number, since it is larger than the sum of its proper divisors (31524441).

55880019 is a wasteful number, since it uses less digits than its factorization.

55880019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36771 (or 36755 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 55880019 is about 7475.2939072655. The cubic root of 55880019 is about 382.3128085721.

The spelling of 55880019 in words is "fifty-five million, eight hundred eighty thousand, nineteen".