22320457 has 2 divisors, whose sum is σ = 22320458. Its totient is φ = 22320456.

The previous prime is 22320433. The next prime is 22320461. The reversal of 22320457 is 75402322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19811401 + 2509056 = 4451^2 + 1584^2 .

It is a cyclic number.

It is not a de Polignac number, because 22320457 - 2¹¹ = 22318409 is a prime.

It is a super-3 number, since 3×22320457³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22300457) 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 as a sum of consecutive naturals, namely, 11160228 + 11160229.

It is an arithmetic number, because the mean of its divisors is an integer number (11160229).

Almost surely, 2^22320457 is an apocalyptic number.

It is an amenable number.

22320457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22320457 is an equidigital number, since it uses as much as digits as its factorization.

22320457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 22320457 is about 4724.4530900412. The cubic root of 22320457 is about 281.5578849253.

Adding to 22320457 its reverse (75402322), we get a palindrome (97722779).

The spelling of 22320457 in words is "twenty-two million, three hundred twenty thousand, four hundred fifty-seven".