222500000 has 96 divisors (see below), whose sum is σ = 553709520. Its totient is φ = 88000000.

The previous prime is 222499987. The next prime is 222500023. The reversal of 222500000 is 5222.

It can be written as a sum of positive squares in 8 ways, for example, as 219158416 + 3341584 = 14804^2 + 1828^2 .

It is a sliding number, since 222500000 = 62500000 + 160000000 and 1/62500000 + 1/160000000 = 0.0000000222500000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2499956 + ... + 2500044.

Almost surely, 2^222500000 is an apocalyptic number.

222500000 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 222500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276854760).

222500000 is an abundant number, since it is smaller than the sum of its proper divisors (331209520).

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

222500000 is an frugal number, since it uses more digits than its factorization.

222500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 222500000 is about 14916.4338901763. The cubic root of 222500000 is about 605.9591370530.

Adding to 222500000 its reverse (5222), we get a palindrome (222505222).

The spelling of 222500000 in words is "two hundred twenty-two million, five hundred thousand".