222538140 has 144 divisors (see below), whose sum is σ = 747242496. Its totient is φ = 53155200.

The previous prime is 222538139. The next prime is 222538153. The reversal of 222538140 is 41835222.

222538140 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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, 139789 + ... + 141371.

It is an arithmetic number, because the mean of its divisors is an integer number (5189184).

Almost surely, 2^222538140 is an apocalyptic number.

222538140 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 222538140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373621248).

222538140 is an abundant number, since it is smaller than the sum of its proper divisors (524704356).

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

222538140 is a wasteful number, since it uses less digits than its factorization.

222538140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1675 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 222538140 is about 14917.7122910988. The cubic root of 222538140 is about 605.9937587175.

The spelling of 222538140 in words is "two hundred twenty-two million, five hundred thirty-eight thousand, one hundred forty".