23212765 has 8 divisors (see below), whose sum is σ = 28534968. Its totient is φ = 18117120.

The previous prime is 23212751. The next prime is 23212771. The reversal of 23212765 is 56721232.

23212765 = T₁₁₀ + T₁₁₁ + ... + T₅₁₉.

It can be written as a sum of positive squares in 4 ways, for example, as 1923769 + 21288996 = 1387^2 + 4614^2 .

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

It is not a de Polignac number, because 23212765 - 2¹¹ = 23210717 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56412 + ... + 56821.

It is an arithmetic number, because the mean of its divisors is an integer number (3566871).

Almost surely, 2^23212765 is an apocalyptic number.

It is an amenable number.

23212765 is a deficient number, since it is larger than the sum of its proper divisors (5322203).

23212765 is a wasteful number, since it uses less digits than its factorization.

23212765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113279.

The product of its digits is 5040, while the sum is 28.

The square root of 23212765 is about 4817.9627437331. The cubic root of 23212765 is about 285.2609285756.

Adding to 23212765 its reverse (56721232), we get a palindrome (79933997).

The spelling of 23212765 in words is "twenty-three million, two hundred twelve thousand, seven hundred sixty-five".