228131222 has 12 divisors (see below), whose sum is σ = 376134108. Its totient is φ = 103695900.

The previous prime is 228131213. The next prime is 228131249. The reversal of 228131222 is 222131822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 471104 + ... + 471587.

It is an arithmetic number, because the mean of its divisors is an integer number (31344509).

Almost surely, 2^228131222 is an apocalyptic number.

228131222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

228131222 is a deficient number, since it is larger than the sum of its proper divisors (148002886).

228131222 is a wasteful number, since it uses less digits than its factorization.

228131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942715 (or 942704 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 228131222 is about 15104.0134401423. The cubic root of 228131222 is about 611.0286522815.

The spelling of 228131222 in words is "two hundred twenty-eight million, one hundred thirty-one thousand, two hundred twenty-two".