23261645 has 12 divisors (see below), whose sum is σ = 30683100. Its totient is φ = 16917120.

The previous prime is 23261633. The next prime is 23261653. The reversal of 23261645 is 54616232.

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 20241001 = 1738^2 + 4499^2 .

It is not a de Polignac number, because 23261645 - 2¹⁰ = 23260621 is a prime.

It is a super-3 number, since 3×23261645³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18620 + ... + 19829.

It is an arithmetic number, because the mean of its divisors is an integer number (2556925).

Almost surely, 2^23261645 is an apocalyptic number.

It is an amenable number.

23261645 is a deficient number, since it is larger than the sum of its proper divisors (7421455).

23261645 is a wasteful number, since it uses less digits than its factorization.

23261645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38476 (or 38465 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 23261645 is about 4823.0327595819. The cubic root of 23261645 is about 285.4610164506.

Adding to 23261645 its reverse (54616232), we get a palindrome (77877877).

The spelling of 23261645 in words is "twenty-three million, two hundred sixty-one thousand, six hundred forty-five".