22581001 has 2 divisors, whose sum is σ = 22581002. Its totient is φ = 22581000.

The previous prime is 22580983. The next prime is 22581019. The reversal of 22581001 is 10018522.

It is a balanced prime because it is at equal distance from previous prime (22580983) and next prime (22581019).

It can be written as a sum of positive squares in only one way, i.e., 12595401 + 9985600 = 3549^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 22581001 - 2⁵ = 22580969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22581001.

It is not a weakly prime, because it can be changed into another prime (22581071) 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 as a sum of consecutive naturals, namely, 11290500 + 11290501.

It is an arithmetic number, because the mean of its divisors is an integer number (11290501).

Almost surely, 2^22581001 is an apocalyptic number.

It is an amenable number.

22581001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22581001 is an equidigital number, since it uses as much as digits as its factorization.

22581001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 22581001 is about 4751.9470746211. The cubic root of 22581001 is about 282.6491800906.

Adding to 22581001 its reverse (10018522), we get a palindrome (32599523).

The spelling of 22581001 in words is "twenty-two million, five hundred eighty-one thousand, one".