222468257 has 4 divisors (see below), whose sum is σ = 242692656. Its totient is φ = 202243860.

The previous prime is 222468241. The next prime is 222468277. The reversal of 222468257 is 752864222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222468257 - 2⁴ = 222468241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222468257.

It is not an unprimeable number, because it can be changed into a prime (222468277) 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 3 ways as a sum of consecutive naturals, for example, 10112183 + ... + 10112204.

It is an arithmetic number, because the mean of its divisors is an integer number (60673164).

Almost surely, 2^222468257 is an apocalyptic number.

It is an amenable number.

222468257 is a deficient number, since it is larger than the sum of its proper divisors (20224399).

222468257 is a wasteful number, since it uses less digits than its factorization.

222468257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20224398.

The product of its digits is 107520, while the sum is 38.

The square root of 222468257 is about 14915.3698244462. The cubic root of 222468257 is about 605.9303192617.

It can be divided in two parts, 22246 and 8257, that added together give a palindrome (30503).

The spelling of 222468257 in words is "two hundred twenty-two million, four hundred sixty-eight thousand, two hundred fifty-seven".