23421513 has 8 divisors (see below), whose sum is σ = 31288576. Its totient is φ = 15584400.

The previous prime is 23421511. The next prime is 23421533. The reversal of 23421513 is 31512432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23421513 - 2¹ = 23421511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23421513.

It is not an unprimeable number, because it can be changed into a prime (23421511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593 + ... + 8838.

It is an arithmetic number, because the mean of its divisors is an integer number (3911072).

Almost surely, 2^23421513 is an apocalyptic number.

It is an amenable number.

23421513 is a deficient number, since it is larger than the sum of its proper divisors (7867063).

23421513 is a wasteful number, since it uses less digits than its factorization.

23421513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14975.

The product of its digits is 720, while the sum is 21.

The square root of 23421513 is about 4839.5777708391. The cubic root of 23421513 is about 286.1134772279.

Adding to 23421513 its reverse (31512432), we get a palindrome (54933945).

The spelling of 23421513 in words is "twenty-three million, four hundred twenty-one thousand, five hundred thirteen".