222246261 has 20 divisors (see below), whose sum is σ = 335738700. Its totient is φ = 146494656.

The previous prime is 222246257. The next prime is 222246289. The reversal of 222246261 is 162642222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123343236 + 98903025 = 11106^2 + 9945^2 .

It is not a de Polignac number, because 222246261 - 2² = 222246257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222246061) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8206 + ... + 22623.

It is an arithmetic number, because the mean of its divisors is an integer number (16786935).

Almost surely, 2^222246261 is an apocalyptic number.

It is an amenable number.

222246261 is a deficient number, since it is larger than the sum of its proper divisors (113492439).

222246261 is an equidigital number, since it uses as much as digits as its factorization.

222246261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30930 (or 30921 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 222246261 is about 14907.9261133130. The cubic root of 222246261 is about 605.7287041690.

Adding to 222246261 its reverse (162642222), we get a palindrome (384888483).

The spelling of 222246261 in words is "two hundred twenty-two million, two hundred forty-six thousand, two hundred sixty-one".