23021161 has 2 divisors, whose sum is σ = 23021162. Its totient is φ = 23021160.

The previous prime is 23021149. The next prime is 23021177. The reversal of 23021161 is 16112032.

It is an a-pointer prime, because the next prime (23021177) can be obtained adding 23021161 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 7371225 = 3956^2 + 2715^2 .

It is a cyclic number.

It is not a de Polignac number, because 23021161 - 2¹⁷ = 22890089 is a prime.

It is not a weakly prime, because it can be changed into another prime (23021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510580 + 11510581.

It is an arithmetic number, because the mean of its divisors is an integer number (11510581).

Almost surely, 2^23021161 is an apocalyptic number.

It is an amenable number.

23021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021161 is an equidigital number, since it uses as much as digits as its factorization.

23021161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 23021161 is about 4798.0372028570. The cubic root of 23021161 is about 284.4738872936.

Adding to 23021161 its reverse (16112032), we get a palindrome (39133193).

The spelling of 23021161 in words is "twenty-three million, twenty-one thousand, one hundred sixty-one".