22452421 has 2 divisors, whose sum is σ = 22452422. Its totient is φ = 22452420.

The previous prime is 22452403. The next prime is 22452431. The reversal of 22452421 is 12425422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21622500 + 829921 = 4650^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 22452421 - 2⁵ = 22452389 is a prime.

It is a super-2 number, since 2×22452421² = 1008222417522482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22452392 and 22452401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22452431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11226210 + 11226211.

It is an arithmetic number, because the mean of its divisors is an integer number (11226211).

Almost surely, 2^22452421 is an apocalyptic number.

It is an amenable number.

22452421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22452421 is an equidigital number, since it uses as much as digits as its factorization.

22452421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 22.

The square root of 22452421 is about 4738.3985691370. The cubic root of 22452421 is about 282.1116746640. Note that the first 3 decimals are identical.

Adding to 22452421 its reverse (12425422), we get a palindrome (34877843).

The spelling of 22452421 in words is "twenty-two million, four hundred fifty-two thousand, four hundred twenty-one".