22401451 has 4 divisors (see below), whose sum is σ = 22671432. Its totient is φ = 22131472.

The previous prime is 22401433. The next prime is 22401473. The reversal of 22401451 is 15410422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15410422 = 2 ⋅7705211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22401451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22401481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134866 + ... + 135031.

It is an arithmetic number, because the mean of its divisors is an integer number (5667858).

Almost surely, 2^22401451 is an apocalyptic number.

22401451 is a deficient number, since it is larger than the sum of its proper divisors (269981).

22401451 is an equidigital number, since it uses as much as digits as its factorization.

22401451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269980.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 22401451 is about 4733.0171138503. The cubic root of 22401451 is about 281.8980358360.

Adding to 22401451 its reverse (15410422), we get a palindrome (37811873).

The spelling of 22401451 in words is "twenty-two million, four hundred one thousand, four hundred fifty-one".