222184640 has 28 divisors (see below), whose sum is σ = 529077936. Its totient is φ = 88873728.

The previous prime is 222184637. The next prime is 222184643. The reversal of 222184640 is 46481222.

It is an interprime number because it is at equal distance from previous prime (222184637) and next prime (222184643).

It is not an unprimeable number, because it can be changed into a prime (222184643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346844 + ... + 347483.

Almost surely, 2^222184640 is an apocalyptic number.

222184640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222184640 is an abundant number, since it is smaller than the sum of its proper divisors (306893296).

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

222184640 is an equidigital number, since it uses as much as digits as its factorization.

222184640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694344 (or 694334 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 222184640 is about 14905.8592506437. The cubic root of 222184640 is about 605.6727166373.

The spelling of 222184640 in words is "two hundred twenty-two million, one hundred eighty-four thousand, six hundred forty".