23081513 has 24 divisors (see below), whose sum is σ = 28987200. Its totient is φ = 17993664.

The previous prime is 23081491. The next prime is 23081519. The reversal of 23081513 is 31518032.

It is not a de Polignac number, because 23081513 - 2¹⁴ = 23065129 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 (23081519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128858 + ... + 129036.

It is an arithmetic number, because the mean of its divisors is an integer number (1207800).

Almost surely, 2^23081513 is an apocalyptic number.

It is an amenable number.

23081513 is a deficient number, since it is larger than the sum of its proper divisors (5905687).

23081513 is a wasteful number, since it uses less digits than its factorization.

23081513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 23081513 is about 4804.3223247405. The cubic root of 23081513 is about 284.7222614870.

Adding to 23081513 its reverse (31518032), we get a palindrome (54599545).

The spelling of 23081513 in words is "twenty-three million, eighty-one thousand, five hundred thirteen".