22187701 has 2 divisors, whose sum is σ = 22187702. Its totient is φ = 22187700.

The previous prime is 22187689. The next prime is 22187707. The reversal of 22187701 is 10778122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20484676 + 1703025 = 4526^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 22187701 - 2¹⁹ = 21663413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22187701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22187707) 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, 11093850 + 11093851.

It is an arithmetic number, because the mean of its divisors is an integer number (11093851).

Almost surely, 2^22187701 is an apocalyptic number.

It is an amenable number.

22187701 is a deficient number, since it is larger than the sum of its proper divisors (1).

22187701 is an equidigital number, since it uses as much as digits as its factorization.

22187701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 22187701 is about 4710.3822562505. The cubic root of 22187701 is about 280.9985646849.

The spelling of 22187701 in words is "twenty-two million, one hundred eighty-seven thousand, seven hundred one".