23201109 has 36 divisors (see below), whose sum is σ = 36513516. Its totient is φ = 14183424.

The previous prime is 23201099. The next prime is 23201117. The reversal of 23201109 is 90110232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13727025 + 9474084 = 3705^2 + 3078^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23201109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23201091 and 23201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 120117 + ... + 120309.

Almost surely, 2^23201109 is an apocalyptic number.

It is an amenable number.

23201109 is a deficient number, since it is larger than the sum of its proper divisors (13312407).

23201109 is a wasteful number, since it uses less digits than its factorization.

23201109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 23201109 is about 4816.7529519376. The cubic root of 23201109 is about 285.2131738441.

The spelling of 23201109 in words is "twenty-three million, two hundred one thousand, one hundred nine".