222141520 has 20 divisors (see below), whose sum is σ = 516479220. Its totient is φ = 88856576.

The previous prime is 222141503. The next prime is 222141529. The reversal of 222141520 is 25141222.

222141520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 114147856 + 107993664 = 10684^2 + 10392^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222141529) 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, 1388305 + ... + 1388464.

It is an arithmetic number, because the mean of its divisors is an integer number (25823961).

Almost surely, 2^222141520 is an apocalyptic number.

222141520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222141520 is an abundant number, since it is smaller than the sum of its proper divisors (294337700).

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

222141520 is a wasteful number, since it uses less digits than its factorization.

222141520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776782 (or 2776776 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 222141520 is about 14904.4127693781. The cubic root of 222141520 is about 605.6335325647.

Adding to 222141520 its reverse (25141222), we get a palindrome (247282742).

The spelling of 222141520 in words is "two hundred twenty-two million, one hundred forty-one thousand, five hundred twenty".