23280661 has 8 divisors (see below), whose sum is σ = 23960664. Its totient is φ = 22606080.

The previous prime is 23280641. The next prime is 23280671. The reversal of 23280661 is 16608232.

It can be written as a sum of positive squares in 4 ways, for example, as 1134225 + 22146436 = 1065^2 + 4706^2 .

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 23280661 - 2¹⁷ = 23149589 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 (23280611) 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, 8335 + ... + 10771.

It is an arithmetic number, because the mean of its divisors is an integer number (2995083).

Almost surely, 2^23280661 is an apocalyptic number.

It is an amenable number.

23280661 is a deficient number, since it is larger than the sum of its proper divisors (680003).

23280661 is a wasteful number, since it uses less digits than its factorization.

23280661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 23280661 is about 4825.0037305685. The cubic root of 23280661 is about 285.5387817759.

Adding to 23280661 its reverse (16608232), we get a palindrome (39888893).

The spelling of 23280661 in words is "twenty-three million, two hundred eighty thousand, six hundred sixty-one".