222337921 has 27 divisors (see below), whose sum is σ = 255678633. Its totient is φ = 193246560.

The previous prime is 222337903. The next prime is 222337937. The reversal of 222337921 is 129733222.

The square root of 222337921 is 14911.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 923521 + 221414400 = 961^2 + 14880^2 .

It is not a de Polignac number, because 222337921 - 2¹⁷ = 222206849 is a prime.

It is a super-2 number, since 2×222337921² = 98868302229204482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

Its product of digits (9072) is a multiple of the sum of its prime divisors (81).

It is not an unprimeable number, because it can be changed into a prime (222337961) 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 26 ways as a sum of consecutive naturals, for example, 6009115 + ... + 6009151.

It is an arithmetic number, because the mean of its divisors is an integer number (9469579).

Almost surely, 2^222337921 is an apocalyptic number.

222337921 is the 14911-st square number.

222337921 is the 7456-th centered octagonal number.

It is an amenable number.

222337921 is a deficient number, since it is larger than the sum of its proper divisors (33340712).

222337921 is an equidigital number, since it uses as much as digits as its factorization.

222337921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 81 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The cubic root of 222337921 is about 605.8119653552.

The spelling of 222337921 in words is "two hundred twenty-two million, three hundred thirty-seven thousand, nine hundred twenty-one".