23161365 has 36 divisors (see below), whose sum is σ = 41194764. Its totient is φ = 12038016.

The previous prime is 23161363. The next prime is 23161373. The reversal of 23161365 is 56316132.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 16719921 = 2538^2 + 4089^2 .

It is not a de Polignac number, because 23161365 - 2¹ = 23161363 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23161363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 99289 + ... + 99521.

It is an arithmetic number, because the mean of its divisors is an integer number (1144299).

Almost surely, 2^23161365 is an apocalyptic number.

It is an amenable number.

23161365 is a deficient number, since it is larger than the sum of its proper divisors (18033399).

23161365 is a wasteful number, since it uses less digits than its factorization.

23161365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 288 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 23161365 is about 4812.6255827770. The cubic root of 23161365 is about 285.0502219897.

Adding to 23161365 its reverse (56316132), we get a palindrome (79477497).

The spelling of 23161365 in words is "twenty-three million, one hundred sixty-one thousand, three hundred sixty-five".