222081720 has 192 divisors, whose sum is σ = 783043200. Its totient is φ = 50238720.

The previous prime is 222081701. The next prime is 222081731. The reversal of 222081720 is 27180222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1052415 + ... + 1052625.

It is an arithmetic number, because the mean of its divisors is an integer number (4078350).

Almost surely, 2^222081720 is an apocalyptic number.

222081720 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 222081720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391521600).

222081720 is an abundant number, since it is smaller than the sum of its proper divisors (560961480).

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

222081720 is a wasteful number, since it uses less digits than its factorization.

222081720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 222081720 is about 14902.4065170697. The cubic root of 222081720 is about 605.5791826236.

The spelling of 222081720 in words is "two hundred twenty-two million, eighty-one thousand, seven hundred twenty".