22272457 has 2 divisors, whose sum is σ = 22272458. Its totient is φ = 22272456.

The previous prime is 22272451. The next prime is 22272473. The reversal of 22272457 is 75427222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22099401 + 173056 = 4701^2 + 416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22272457 is a prime.

It is not a weakly prime, because it can be changed into another prime (22272451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11136228 + 11136229.

It is an arithmetic number, because the mean of its divisors is an integer number (11136229).

Almost surely, 2^22272457 is an apocalyptic number.

It is an amenable number.

22272457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22272457 is an equidigital number, since it uses as much as digits as its factorization.

22272457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 31.

The square root of 22272457 is about 4719.3704029245. The cubic root of 22272457 is about 281.3559105977.

Adding to 22272457 its reverse (75427222), we get a palindrome (97699679).

The spelling of 22272457 in words is "twenty-two million, two hundred seventy-two thousand, four hundred fifty-seven".