55722219 has 16 divisors (see below), whose sum is σ = 86304000. Its totient is φ = 31318560.

The previous prime is 55722203. The next prime is 55722223. The reversal of 55722219 is 91222755.

It is a happy number.

It is not a de Polignac number, because 55722219 - 2⁴ = 55722203 is a prime.

It is a super-2 number, since 2×55722219² = 6209931380567922, 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 55722219.

It is not an unprimeable number, because it can be changed into a prime (55722229) 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, 20469 + ... + 23030.

It is an arithmetic number, because the mean of its divisors is an integer number (5394000).

Almost surely, 2^55722219 is an apocalyptic number.

55722219 is a deficient number, since it is larger than the sum of its proper divisors (30581781).

55722219 is a wasteful number, since it uses less digits than its factorization.

55722219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43570.

The product of its digits is 12600, while the sum is 33.

The square root of 55722219 is about 7464.7316763565. The cubic root of 55722219 is about 381.9525972996.

The spelling of 55722219 in words is "fifty-five million, seven hundred twenty-two thousand, two hundred nineteen".