55155219 has 16 divisors (see below), whose sum is σ = 87700992. Its totient is φ = 30146688.

The previous prime is 55155179. The next prime is 55155227. The reversal of 55155219 is 91255155.

It is not a de Polignac number, because 55155219 - 2⁹ = 55154707 is a prime.

It is a super-2 number, since 2×55155219² = 6084196365875922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55155219.

It is not an unprimeable number, because it can be changed into a prime (55155229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56614 + ... + 57579.

It is an arithmetic number, because the mean of its divisors is an integer number (5481312).

Almost surely, 2^55155219 is an apocalyptic number.

55155219 is a deficient number, since it is larger than the sum of its proper divisors (32545773).

55155219 is a wasteful number, since it uses less digits than its factorization.

55155219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114226.

The product of its digits is 11250, while the sum is 33.

The square root of 55155219 is about 7426.6559769522. The cubic root of 55155219 is about 380.6526618629.

The spelling of 55155219 in words is "fifty-five million, one hundred fifty-five thousand, two hundred nineteen".