55123228 has 24 divisors (see below), whose sum is σ = 98904960. Its totient is φ = 26872560.

The previous prime is 55123223. The next prime is 55123241. The reversal of 55123228 is 82232155.

It is a junction number, because it is equal to n+sod(n) for n = 55123196 and 55123205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30025 + ... + 31807.

It is an arithmetic number, because the mean of its divisors is an integer number (4121040).

Almost surely, 2^55123228 is an apocalyptic number.

It is an amenable number.

55123228 is a deficient number, since it is larger than the sum of its proper divisors (43781732).

55123228 is a wasteful number, since it uses less digits than its factorization.

55123228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1975 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 55123228 is about 7424.5018688125. The cubic root of 55123228 is about 380.5790525433.

The spelling of 55123228 in words is "fifty-five million, one hundred twenty-three thousand, two hundred twenty-eight".