23172361 has 2 divisors, whose sum is σ = 23172362. Its totient is φ = 23172360.

The previous prime is 23172349. The next prime is 23172367. The reversal of 23172361 is 16327132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15015625 + 8156736 = 3875^2 + 2856^2 .

It is a cyclic number.

It is not a de Polignac number, because 23172361 - 2¹¹ = 23170313 is a prime.

It is not a weakly prime, because it can be changed into another prime (23172367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11586180 + 11586181.

It is an arithmetic number, because the mean of its divisors is an integer number (11586181).

Almost surely, 2^23172361 is an apocalyptic number.

It is an amenable number.

23172361 is a deficient number, since it is larger than the sum of its proper divisors (1).

23172361 is an equidigital number, since it uses as much as digits as its factorization.

23172361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 23172361 is about 4813.7678589645. The cubic root of 23172361 is about 285.0953246329.

Adding to 23172361 its reverse (16327132), we get a palindrome (39499493).

The spelling of 23172361 in words is "twenty-three million, one hundred seventy-two thousand, three hundred sixty-one".