23115645 has 64 divisors (see below), whose sum is σ = 47854080. Its totient is φ = 10368000.

The previous prime is 23115643. The next prime is 23115661. The reversal of 23115645 is 54651132.

23115645 is a `hidden beast` number, since 2 + 3 + 1 + 15 + 645 = 666.

It is not a de Polignac number, because 23115645 - 2¹ = 23115643 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 Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57445 + ... + 57845.

It is an arithmetic number, because the mean of its divisors is an integer number (747720).

Almost surely, 2^23115645 is an apocalyptic number.

It is an amenable number.

23115645 is an abundant number, since it is smaller than the sum of its proper divisors (24738435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23115645 is a wasteful number, since it uses less digits than its factorization.

23115645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 477 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 23115645 is about 4807.8732304419. The cubic root of 23115645 is about 284.8625375873.

Adding to 23115645 its reverse (54651132), we get a palindrome (77766777).

It can be divided in two parts, 231 and 15645, that added together give a square (15876 = 126²).

The spelling of 23115645 in words is "twenty-three million, one hundred fifteen thousand, six hundred forty-five".