55170219 has 48 divisors (see below), whose sum is σ = 87119712. Its totient is φ = 30910464.

The previous prime is 55170211. The next prime is 55170239. The reversal of 55170219 is 91207155.

It is not a de Polignac number, because 55170219 - 2³ = 55170211 is a prime.

It is a super-2 number, since 2×55170219² = 6087506129015922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55170211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 318817 + ... + 318989.

It is an arithmetic number, because the mean of its divisors is an integer number (1814994).

Almost surely, 2^55170219 is an apocalyptic number.

55170219 is a deficient number, since it is larger than the sum of its proper divisors (31949493).

55170219 is a wasteful number, since it uses less digits than its factorization.

55170219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 55170219 is about 7427.6657840805. The cubic root of 55170219 is about 380.6871661371.

The spelling of 55170219 in words is "fifty-five million, one hundred seventy thousand, two hundred nineteen".