22451437 has 2 divisors, whose sum is σ = 22451438. Its totient is φ = 22451436.

The previous prime is 22451413. The next prime is 22451449. The reversal of 22451437 is 73415422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15634116 + 6817321 = 3954^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 22451437 - 2⁷ = 22451309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22451467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11225718 + 11225719.

It is an arithmetic number, because the mean of its divisors is an integer number (11225719).

Almost surely, 2^22451437 is an apocalyptic number.

It is an amenable number.

22451437 is a deficient number, since it is larger than the sum of its proper divisors (1).

22451437 is an equidigital number, since it uses as much as digits as its factorization.

22451437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 22451437 is about 4738.2947354507. The cubic root of 22451437 is about 282.1075533276.

Adding to 22451437 its reverse (73415422), we get a palindrome (95866859).

The spelling of 22451437 in words is "twenty-two million, four hundred fifty-one thousand, four hundred thirty-seven".