55219769 has 4 divisors (see below), whose sum is σ = 60239760. Its totient is φ = 50199780.

The previous prime is 55219763. The next prime is 55219781. The reversal of 55219769 is 96791255.

It is a happy number.

55219769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55219769 - 2¹⁶ = 55154233 is a prime.

It is a super-2 number, since 2×55219769² = 6098445776826722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55219763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2509979 + ... + 2510000.

It is an arithmetic number, because the mean of its divisors is an integer number (15059940).

Almost surely, 2^55219769 is an apocalyptic number.

It is an amenable number.

55219769 is a deficient number, since it is larger than the sum of its proper divisors (5019991).

55219769 is a wasteful number, since it uses less digits than its factorization.

55219769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019990.

The product of its digits is 170100, while the sum is 44.

The square root of 55219769 is about 7431.0005382855. Note that the first 3 decimals coincide. The cubic root of 55219769 is about 380.8011008232.

The spelling of 55219769 in words is "fifty-five million, two hundred nineteen thousand, seven hundred sixty-nine".