22149901 has 2 divisors, whose sum is σ = 22149902. Its totient is φ = 22149900.

The previous prime is 22149899. The next prime is 22149923. The reversal of 22149901 is 10994122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 10074276 = 3475^2 + 3174^2 .

It is a cyclic number.

It is not a de Polignac number, because 22149901 - 2¹ = 22149899 is a prime.

It is a super-2 number, since 2×22149901² = 981236228619602, which contains 22 as substring.

Together with 22149899, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22149901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22149931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11074950 + 11074951.

It is an arithmetic number, because the mean of its divisors is an integer number (11074951).

Almost surely, 2^22149901 is an apocalyptic number.

It is an amenable number.

22149901 is a deficient number, since it is larger than the sum of its proper divisors (1).

22149901 is an equidigital number, since it uses as much as digits as its factorization.

22149901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 22149901 is about 4706.3681326475. The cubic root of 22149901 is about 280.8388999025.

The spelling of 22149901 in words is "twenty-two million, one hundred forty-nine thousand, nine hundred one".