23081765 has 32 divisors (see below), whose sum is σ = 33716736. Its totient is φ = 14826240.

The previous prime is 23081761. The next prime is 23081783. The reversal of 23081765 is 56718032.

It is a happy number.

It is not a de Polignac number, because 23081765 - 2² = 23081761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23081761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42395 + ... + 42935.

It is an arithmetic number, because the mean of its divisors is an integer number (1053648).

Almost surely, 2^23081765 is an apocalyptic number.

It is an amenable number.

23081765 is a deficient number, since it is larger than the sum of its proper divisors (10634971).

23081765 is a wasteful number, since it uses less digits than its factorization.

23081765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 23081765 is about 4804.3485510525. The cubic root of 23081765 is about 284.7232976662.

Adding to 23081765 its reverse (56718032), we get a palindrome (79799797).

The spelling of 23081765 in words is "twenty-three million, eighty-one thousand, seven hundred sixty-five".