23983515 has 48 divisors (see below), whose sum is σ = 44579808. Its totient is φ = 11885568.

The previous prime is 23983513. The next prime is 23983517. The reversal of 23983515 is 51538932.

It is an interprime number because it is at equal distance from previous prime (23983513) and next prime (23983517).

It is not a de Polignac number, because 23983515 - 2¹ = 23983513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23983515.

It is not an unprimeable number, because it can be changed into a prime (23983513) 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 47 ways as a sum of consecutive naturals, for example, 81709 + ... + 82001.

It is an arithmetic number, because the mean of its divisors is an integer number (928746).

Almost surely, 2^23983515 is an apocalyptic number.

23983515 is a deficient number, since it is larger than the sum of its proper divisors (20596293).

23983515 is a wasteful number, since it uses less digits than its factorization.

23983515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 425 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 23983515 is about 4897.2967032844. The cubic root of 23983515 is about 288.3838559230.

Adding to 23983515 its product of digits (32400), we get a triangular number (24015915 = T₆₉₃₀).

The spelling of 23983515 in words is "twenty-three million, nine hundred eighty-three thousand, five hundred fifteen".