22272451 has 2 divisors, whose sum is σ = 22272452. Its totient is φ = 22272450.

The previous prime is 22272443. The next prime is 22272457. The reversal of 22272451 is 15427222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22272451 - 2³ = 22272443 is a prime.

It is equal to p_1405258 and since 22272451 and 1405258 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22272457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11136225 + 11136226.

It is an arithmetic number, because the mean of its divisors is an integer number (11136226).

Almost surely, 2^22272451 is an apocalyptic number.

22272451 is a deficient number, since it is larger than the sum of its proper divisors (1).

22272451 is an equidigital number, since it uses as much as digits as its factorization.

22272451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 25.

The square root of 22272451 is about 4719.3697672465. The cubic root of 22272451 is about 281.3558853328.

Adding to 22272451 its reverse (15427222), we get a palindrome (37699673).

The spelling of 22272451 in words is "twenty-two million, two hundred seventy-two thousand, four hundred fifty-one".