22216457 has 2 divisors, whose sum is σ = 22216458. Its totient is φ = 22216456.

The previous prime is 22216451. The next prime is 22216507. The reversal of 22216457 is 75461222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 3171961 = 4364^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 22216457 - 2²² = 18022153 is a prime.

It is not a weakly prime, because it can be changed into another prime (22216451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11108228 + 11108229.

It is an arithmetic number, because the mean of its divisors is an integer number (11108229).

Almost surely, 2^22216457 is an apocalyptic number.

It is an amenable number.

22216457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22216457 is an equidigital number, since it uses as much as digits as its factorization.

22216457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 22216457 is about 4713.4336740852. The cubic root of 22216457 is about 281.1199067807.

Adding to 22216457 its reverse (75461222), we get a palindrome (97677679).

The spelling of 22216457 in words is "twenty-two million, two hundred sixteen thousand, four hundred fifty-seven".