23640331 has 8 divisors (see below), whose sum is σ = 27773424. Its totient is φ = 19837920.

The previous prime is 23640311. The next prime is 23640341. The reversal of 23640331 is 13304632.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23640331 - 2⁷ = 23640203 is a prime.

It is a super-2 number, since 2×23640331² = 1117730499579122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23640311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82516 + ... + 82801.

It is an arithmetic number, because the mean of its divisors is an integer number (3471678).

Almost surely, 2^23640331 is an apocalyptic number.

23640331 is a deficient number, since it is larger than the sum of its proper divisors (4133093).

23640331 is a wasteful number, since it uses less digits than its factorization.

23640331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165341.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 23640331 is about 4862.1323511398. The cubic root of 23640331 is about 287.0017320328.

Adding to 23640331 its reverse (13304632), we get a palindrome (36944963).

The spelling of 23640331 in words is "twenty-three million, six hundred forty thousand, three hundred thirty-one".