23281623 has 6 divisors (see below), whose sum is σ = 33629024. Its totient is φ = 15521076.

The previous prime is 23281613. The next prime is 23281663. The reversal of 23281623 is 32618232.

23281623 is a `hidden beast` number, since 2 + 32 + 8 + 1 + 623 = 666.

It is not a de Polignac number, because 23281623 - 2⁸ = 23281367 is a prime.

It is a super-3 number, since 3×23281623³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23281603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1293415 + ... + 1293432.

Almost surely, 2^23281623 is an apocalyptic number.

23281623 is a deficient number, since it is larger than the sum of its proper divisors (10347401).

23281623 is a wasteful number, since it uses less digits than its factorization.

23281623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586853 (or 2586850 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 23281623 is about 4825.1034185808. The cubic root of 23281623 is about 285.5427147187.

Adding to 23281623 its reverse (32618232), we get a palindrome (55899855).

The spelling of 23281623 in words is "twenty-three million, two hundred eighty-one thousand, six hundred twenty-three".