22016451 has 12 divisors (see below), whose sum is σ = 30689288. Its totient is φ = 14038464.

The previous prime is 22016447. The next prime is 22016471. The reversal of 22016451 is 15461022.

It is not a de Polignac number, because 22016451 - 2² = 22016447 is a prime.

It is a super-2 number, since 2×22016451² = 969448229270802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22016471) 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, 5350 + ... + 8523.

Almost surely, 2^22016451 is an apocalyptic number.

22016451 is a deficient number, since it is larger than the sum of its proper divisors (8672837).

22016451 is a wasteful number, since it uses less digits than its factorization.

22016451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13922 (or 13899 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 22016451 is about 4692.1691145993. The cubic root of 22016451 is about 280.2737586170.

Adding to 22016451 its reverse (15461022), we get a palindrome (37477473).

The spelling of 22016451 in words is "twenty-two million, sixteen thousand, four hundred fifty-one".