22400003 has 4 divisors (see below), whose sum is σ = 22715568. Its totient is φ = 22084440.

The previous prime is 22399991. The next prime is 22400009. The reversal of 22400003 is 30000422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30000422 = 2 ⋅15000211.

It is a cyclic number.

It is not a de Polignac number, because 22400003 - 2⁴ = 22399987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22400009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157676 + ... + 157817.

It is an arithmetic number, because the mean of its divisors is an integer number (5678892).

Almost surely, 2^22400003 is an apocalyptic number.

22400003 is a deficient number, since it is larger than the sum of its proper divisors (315565).

22400003 is an equidigital number, since it uses as much as digits as its factorization.

22400003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315564.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 22400003 is about 4732.8641434125. The cubic root of 22400003 is about 281.8919618671.

Adding to 22400003 its reverse (30000422), we get a palindrome (52400425).

The spelling of 22400003 in words is "twenty-two million, four hundred thousand, three".