22051451 has 4 divisors (see below), whose sum is σ = 22073832. Its totient is φ = 22029072.

The previous prime is 22051433. The next prime is 22051459. The reversal of 22051451 is 15415022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22051451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22051459) 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, 9641 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (5518458).

Almost surely, 2^22051451 is an apocalyptic number.

22051451 is a deficient number, since it is larger than the sum of its proper divisors (22381).

22051451 is a wasteful number, since it uses less digits than its factorization.

22051451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22380.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 22051451 is about 4695.8972518572. The cubic root of 22051451 is about 280.4221989503.

Adding to 22051451 its reverse (15415022), we get a palindrome (37466473).

The spelling of 22051451 in words is "twenty-two million, fifty-one thousand, four hundred fifty-one".