55289019 has 12 divisors (see below), whose sum is σ = 74688936. Its totient is φ = 36380448.

The previous prime is 55289011. The next prime is 55289021. The reversal of 55289019 is 91098255.

It is not a de Polignac number, because 55289019 - 2³ = 55289011 is a prime.

It is a super-2 number, since 2×55289019² = 6113751243964722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55289011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17247 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (6224078).

Almost surely, 2^55289019 is an apocalyptic number.

55289019 is a deficient number, since it is larger than the sum of its proper divisors (19399917).

55289019 is an equidigital number, since it uses as much as digits as its factorization.

55289019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114 (or 3035 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 55289019 is about 7435.6586123894. The cubic root of 55289019 is about 380.9602193226.

The spelling of 55289019 in words is "fifty-five million, two hundred eighty-nine thousand, nineteen".