177225228 has 18 divisors (see below), whose sum is σ = 447986084. Its totient is φ = 59075064.

The previous prime is 177225157. The next prime is 177225241. The reversal of 177225228 is 822522771.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4922923 = 177225228 / (1 + 7 + 7 + 2 + 2 + 5 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 177225192 and 177225201.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 2461426 + ... + 2461497.

Almost surely, 2^177225228 is an apocalyptic number.

177225228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

177225228 is an abundant number, since it is smaller than the sum of its proper divisors (270760856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

177225228 is a wasteful number, since it uses less digits than its factorization.

177225228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922933 (or 4922928 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 177225228 is about 13312.5965911989. The cubic root of 177225228 is about 561.7052907876.

Adding to 177225228 its reverse (822522771), we get a palindrome (999747999).

It can be divided in two parts, 1772 and 25228, that added together give a cube (27000 = 30³).

The spelling of 177225228 in words is "one hundred seventy-seven million, two hundred twenty-five thousand, two hundred twenty-eight".