55122292 has 12 divisors (see below), whose sum is σ = 97626816. Its totient is φ = 27228920.

The previous prime is 55122289. The next prime is 55122293. The reversal of 55122292 is 29222155.

It is a self number, because there is not a number n which added to its sum of digits gives 55122292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55122293) 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, 82684 + ... + 83347.

It is an arithmetic number, because the mean of its divisors is an integer number (8135568).

Almost surely, 2^55122292 is an apocalyptic number.

It is an amenable number.

55122292 is a deficient number, since it is larger than the sum of its proper divisors (42504524).

55122292 is a wasteful number, since it uses less digits than its factorization.

55122292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166118 (or 166116 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 55122292 is about 7424.4388340130. The cubic root of 55122292 is about 380.5768984362.

The spelling of 55122292 in words is "fifty-five million, one hundred twenty-two thousand, two hundred ninety-two".