23071513 has 4 divisors (see below), whose sum is σ = 23108148. Its totient is φ = 23034880.

The previous prime is 23071511. The next prime is 23071519. The reversal of 23071513 is 31517032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20675209 + 2396304 = 4547^2 + 1548^2 .

It is a cyclic number.

It is not a de Polignac number, because 23071513 - 2¹ = 23071511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23071511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17356 + ... + 18637.

It is an arithmetic number, because the mean of its divisors is an integer number (5777037).

Almost surely, 2^23071513 is an apocalyptic number.

It is an amenable number.

23071513 is a deficient number, since it is larger than the sum of its proper divisors (36635).

23071513 is an equidigital number, since it uses as much as digits as its factorization.

23071513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36634.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 23071513 is about 4803.2814824867. The cubic root of 23071513 is about 284.6811371769.

Adding to 23071513 its reverse (31517032), we get a palindrome (54588545).

The spelling of 23071513 in words is "twenty-three million, seventy-one thousand, five hundred thirteen".