22400451 has 12 divisors (see below), whose sum is σ = 32432400. Its totient is φ = 14898480.

The previous prime is 22400447. The next prime is 22400453. The reversal of 22400451 is 15400422.

It is not a de Polignac number, because 22400451 - 2² = 22400447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22400453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1450 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (2702700).

Almost surely, 2^22400451 is an apocalyptic number.

22400451 is a deficient number, since it is larger than the sum of its proper divisors (10031949).

22400451 is a wasteful number, since it uses less digits than its factorization.

22400451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5866 (or 5863 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22400451 is about 4732.9114718110. The cubic root of 22400451 is about 281.8938411340.

Adding to 22400451 its reverse (15400422), we get a palindrome (37800873).

The spelling of 22400451 in words is "twenty-two million, four hundred thousand, four hundred fifty-one".