55043519 has 4 divisors (see below), whose sum is σ = 55976520. Its totient is φ = 54110520.

The previous prime is 55043497. The next prime is 55043539. The reversal of 55043519 is 91534055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55043519 is a prime.

It is a super-2 number, since 2×55043519² = 6059577967806722, 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 (55043539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466412 + ... + 466529.

It is an arithmetic number, because the mean of its divisors is an integer number (13994130).

Almost surely, 2^55043519 is an apocalyptic number.

55043519 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

55043519 is a deficient number, since it is larger than the sum of its proper divisors (933001).

55043519 is an equidigital number, since it uses as much as digits as its factorization.

55043519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933000.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 55043519 is about 7419.1319573114. The cubic root of 55043519 is about 380.3955230799.

The spelling of 55043519 in words is "fifty-five million, forty-three thousand, five hundred nineteen".