222145308 has 96 divisors (see below), whose sum is σ = 718072320. Its totient is φ = 57697920.

The previous prime is 222145279. The next prime is 222145327. The reversal of 222145308 is 803541222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5041 + ... + 21672.

It is an arithmetic number, because the mean of its divisors is an integer number (7479920).

Almost surely, 2^222145308 is an apocalyptic number.

222145308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222145308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359036160).

222145308 is an abundant number, since it is smaller than the sum of its proper divisors (495927012).

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

222145308 is a wasteful number, since it uses less digits than its factorization.

222145308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26744 (or 26736 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 222145308 is about 14904.5398452955. The cubic root of 222145308 is about 605.6369750050.

It can be divided in two parts, 222 and 145308, that added together give a triangular number (145530 = T₅₃₉).

The spelling of 222145308 in words is "two hundred twenty-two million, one hundred forty-five thousand, three hundred eight".