22401013 has 4 divisors (see below), whose sum is σ = 22410540. Its totient is φ = 22391488.

The previous prime is 22400971. The next prime is 22401017. The reversal of 22401013 is 31010422.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21003889 + 1397124 = 4583^2 + 1182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22401013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22400984 and 22401002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22401017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581 + ... + 6877.

It is an arithmetic number, because the mean of its divisors is an integer number (5602635).

Almost surely, 2^22401013 is an apocalyptic number.

It is an amenable number.

22401013 is a deficient number, since it is larger than the sum of its proper divisors (9527).

22401013 is an equidigital number, since it uses as much as digits as its factorization.

22401013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22401013 is about 4732.9708429273. The cubic root of 22401013 is about 281.8961985719.

Adding to 22401013 its reverse (31010422), we get a palindrome (53411435).

The spelling of 22401013 in words is "twenty-two million, four hundred one thousand, thirteen".