55222628 has 6 divisors (see below), whose sum is σ = 96639606. Its totient is φ = 27611312.

The previous prime is 55222627. The next prime is 55222633. The reversal of 55222628 is 82622255.

It can be written as a sum of positive squares in only one way, i.e., 54051904 + 1170724 = 7352^2 + 1082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55222594 and 55222603.

It is not an unprimeable number, because it can be changed into a prime (55222627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6902825 + ... + 6902832.

It is an arithmetic number, because the mean of its divisors is an integer number (16106601).

Almost surely, 2^55222628 is an apocalyptic number.

It is an amenable number.

55222628 is a deficient number, since it is larger than the sum of its proper divisors (41416978).

55222628 is a wasteful number, since it uses less digits than its factorization.

55222628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13805661 (or 13805659 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 55222628 is about 7431.1929055839. The cubic root of 55222628 is about 380.8076726940.

The spelling of 55222628 in words is "fifty-five million, two hundred twenty-two thousand, six hundred twenty-eight".