23215361 has 6 divisors (see below), whose sum is σ = 25138710. Its totient is φ = 21429408.

The previous prime is 23215351. The next prime is 23215393. The reversal of 23215361 is 16351232.

It can be written as a sum of positive squares in 3 ways, for example, as 414736 + 22800625 = 644^2 + 4775^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23215361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23215351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68516 + ... + 68853.

It is an arithmetic number, because the mean of its divisors is an integer number (4189785).

Almost surely, 2^23215361 is an apocalyptic number.

It is an amenable number.

23215361 is a deficient number, since it is larger than the sum of its proper divisors (1923349).

23215361 is a wasteful number, since it uses less digits than its factorization.

23215361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137395 (or 137382 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 23215361 is about 4818.2321446771. The cubic root of 23215361 is about 285.2715622329.

Adding to 23215361 its reverse (16351232), we get a palindrome (39566593).

The spelling of 23215361 in words is "twenty-three million, two hundred fifteen thousand, three hundred sixty-one".