55169219 has 4 divisors (see below), whose sum is σ = 63050544. Its totient is φ = 47287896.

The previous prime is 55169197. The next prime is 55169269. The reversal of 55169219 is 91296155.

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-55169219 is a prime.

It is a super-2 number, since 2×55169219² = 6087285450139922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55169269) 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, 3940652 + ... + 3940665.

It is an arithmetic number, because the mean of its divisors is an integer number (15762636).

Almost surely, 2^55169219 is an apocalyptic number.

55169219 is a deficient number, since it is larger than the sum of its proper divisors (7881325).

55169219 is an equidigital number, since it uses as much as digits as its factorization.

55169219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7881324.

The product of its digits is 24300, while the sum is 38.

The square root of 55169219 is about 7427.5984678764. The cubic root of 55169219 is about 380.6848660468.

The spelling of 55169219 in words is "fifty-five million, one hundred sixty-nine thousand, two hundred nineteen".