222500420 has 24 divisors (see below), whose sum is σ = 494736984. Its totient is φ = 83764736.

The previous prime is 222500407. The next prime is 222500429. The reversal of 222500420 is 24005222.

222500420 is digitally balanced in base 3, 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 4 ways, for example, as 101324356 + 121176064 = 10066^2 + 11008^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (222500429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326867 + ... + 327546.

It is an arithmetic number, because the mean of its divisors is an integer number (20614041).

Almost surely, 2^222500420 is an apocalyptic number.

222500420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222500420 is an abundant number, since it is smaller than the sum of its proper divisors (272236564).

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

222500420 is a wasteful number, since it uses less digits than its factorization.

222500420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654439 (or 654437 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 222500420 is about 14916.4479686016. The cubic root of 222500420 is about 605.9595183304.

Adding to 222500420 its reverse (24005222), we get a palindrome (246505642).

The spelling of 222500420 in words is "two hundred twenty-two million, five hundred thousand, four hundred twenty".