22451001 has 4 divisors (see below), whose sum is σ = 29934672. Its totient is φ = 14967332.

The previous prime is 22450997. The next prime is 22451003. The reversal of 22451001 is 10015422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22451001 - 2² = 22450997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22451003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741831 + ... + 3741836.

It is an arithmetic number, because the mean of its divisors is an integer number (7483668).

Almost surely, 2^22451001 is an apocalyptic number.

It is an amenable number.

22451001 is a deficient number, since it is larger than the sum of its proper divisors (7483671).

22451001 is an equidigital number, since it uses as much as digits as its factorization.

22451001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7483670.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 22451001 is about 4738.2487271143. The cubic root of 22451001 is about 282.1057271685.

Adding to 22451001 its reverse (10015422), we get a palindrome (32466423).

The spelling of 22451001 in words is "twenty-two million, four hundred fifty-one thousand, one".