22525001 has 2 divisors, whose sum is σ = 22525002. Its totient is φ = 22525000.

The previous prime is 22524989. The next prime is 22525037. The reversal of 22525001 is 10052522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 4206601 = 4280^2 + 2051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22525001 is a prime.

It is not a weakly prime, because it can be changed into another prime (22525091) 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 as a sum of consecutive naturals, namely, 11262500 + 11262501.

It is an arithmetic number, because the mean of its divisors is an integer number (11262501).

Almost surely, 2^22525001 is an apocalyptic number.

It is an amenable number.

22525001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22525001 is an equidigital number, since it uses as much as digits as its factorization.

22525001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 22525001 is about 4746.0510953845. The cubic root of 22525001 is about 282.4153337005.

Adding to 22525001 its reverse (10052522), we get a palindrome (32577523).

The spelling of 22525001 in words is "twenty-two million, five hundred twenty-five thousand, one".