23280621 has 32 divisors (see below), whose sum is σ = 38949120. Its totient is φ = 12040704.

The previous prime is 23280619. The next prime is 23280637. The reversal of 23280621 is 12608232.

It is not a de Polignac number, because 23280621 - 2¹ = 23280619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23280591 and 23280600.

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 31 ways as a sum of consecutive naturals, for example, 13665 + ... + 15273.

It is an arithmetic number, because the mean of its divisors is an integer number (1217160).

Almost surely, 2^23280621 is an apocalyptic number.

23280621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23280621 is a deficient number, since it is larger than the sum of its proper divisors (15668499).

23280621 is a wasteful number, since it uses less digits than its factorization.

23280621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 23280621 is about 4824.9995854922. Note that the first 3 decimals coincide. The cubic root of 23280621 is about 285.5386182416.

Adding to 23280621 its reverse (12608232), we get a palindrome (35888853).

The spelling of 23280621 in words is "twenty-three million, two hundred eighty thousand, six hundred twenty-one".