222156000 has 576 divisors, whose sum is σ = 941129280. Its totient is φ = 50688000.

The previous prime is 222155971. The next prime is 222156023. The reversal of 222156000 is 651222.

222156000 = T₄₁₆ + T₄₁₇ + ... + T₁₁₁₉.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13067992 + ... + 13068008.

It is an arithmetic number, because the mean of its divisors is an integer number (1633905).

Almost surely, 2^222156000 is an apocalyptic number.

222156000 is a gapful number since it is divisible by the number (20) 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 222156000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470564640).

222156000 is an abundant number, since it is smaller than the sum of its proper divisors (718973280).

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

222156000 is a wasteful number, since it uses less digits than its factorization.

222156000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 222156000 is about 14904.8985236398. The cubic root of 222156000 is about 605.6466914180.

The spelling of 222156000 in words is "two hundred twenty-two million, one hundred fifty-six thousand".