55122772 has 48 divisors (see below), whose sum is σ = 105649488. Its totient is φ = 25067520.

The previous prime is 55122733. The next prime is 55122779. The reversal of 55122772 is 27722155.

It can be written as a sum of positive squares in 8 ways, for example, as 1012036 + 54110736 = 1006^2 + 7356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55122779) 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, 402288 + ... + 402424.

It is an arithmetic number, because the mean of its divisors is an integer number (2201031).

Almost surely, 2^55122772 is an apocalyptic number.

It is an amenable number.

55122772 is a deficient number, since it is larger than the sum of its proper divisors (50526716).

55122772 is a wasteful number, since it uses less digits than its factorization.

55122772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its digits is 9800, while the sum is 31.

The square root of 55122772 is about 7424.4711596180. The cubic root of 55122772 is about 380.5780031095.

The spelling of 55122772 in words is "fifty-five million, one hundred twenty-two thousand, seven hundred seventy-two".