222231856798249 has 9 divisors (see below), whose sum is σ = 222518971507287. Its totient is φ = 221945112132144.

The previous prime is 222231856798181. The next prime is 222231856798267. The reversal of 222231856798249 is 942897658132222.

It is a happy number.

The square root of 222231856798249 is 14907443.

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

It can be written as a sum of positive squares in only one way, i.e., 195610797404649 + 26621059393600 = 13986093^2 + 5159560^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222231856798249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222231856798849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12060112174 + ... + 12060130600.

Almost surely, 2^{222231856798249} is an apocalyptic number.

222231856798249 is the 14907443-rd square number.

222231856798249 is the 7453722-nd centered octagonal number.

It is an amenable number.

222231856798249 is a deficient number, since it is larger than the sum of its proper divisors (287114709038).

222231856798249 is an frugal number, since it uses more digits than its factorization.

222231856798249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38472 (or 19236 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 70.

The spelling of 222231856798249 in words is "two hundred twenty-two trillion, two hundred thirty-one billion, eight hundred fifty-six million, seven hundred ninety-eight thousand, two hundred forty-nine".