222522500 has 30 divisors (see below), whose sum is σ = 486617670. Its totient is φ = 89008000.

The previous prime is 222522479. The next prime is 222522511. The reversal of 222522500 is 5225222.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 78570496 + 143952004 = 8864^2 + 11998^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42005 + ... + 47004.

It is an arithmetic number, because the mean of its divisors is an integer number (16220589).

Almost surely, 2^222522500 is an apocalyptic number.

222522500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222522500 is an abundant number, since it is smaller than the sum of its proper divisors (264095170).

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

222522500 is an equidigital number, since it uses as much as digits as its factorization.

222522500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89033 (or 89016 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 222522500 is about 14917.1880728239. The cubic root of 222522500 is about 605.9795619534.

Adding to 222522500 its reverse (5225222), we get a palindrome (227747722).

The spelling of 222522500 in words is "two hundred twenty-two million, five hundred twenty-two thousand, five hundred".