222861620 has 12 divisors (see below), whose sum is σ = 468009444. Its totient is φ = 89144640.

The previous prime is 222861581. The next prime is 222861673. The reversal of 222861620 is 26168222.

It can be written as a sum of positive squares in 2 ways, for example, as 152670736 + 70190884 = 12356^2 + 8378^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5571521 + ... + 5571560.

It is an arithmetic number, because the mean of its divisors is an integer number (39000787).

Almost surely, 2^222861620 is an apocalyptic number.

222861620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222861620 is an abundant number, since it is smaller than the sum of its proper divisors (245147824).

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

222861620 is a wasteful number, since it uses less digits than its factorization.

222861620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11143090 (or 11143088 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 222861620 is about 14928.5504989600. The cubic root of 222861620 is about 606.2872394314.

The spelling of 222861620 in words is "two hundred twenty-two million, eight hundred sixty-one thousand, six hundred twenty".