23140513 has 4 divisors (see below), whose sum is σ = 25244208. Its totient is φ = 21036820.

The previous prime is 23140501. The next prime is 23140531. The reversal of 23140513 is 31504132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23140513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23140813) 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, 1051831 + ... + 1051852.

It is an arithmetic number, because the mean of its divisors is an integer number (6311052).

Almost surely, 2^23140513 is an apocalyptic number.

It is an amenable number.

23140513 is a deficient number, since it is larger than the sum of its proper divisors (2103695).

23140513 is a wasteful number, since it uses less digits than its factorization.

23140513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103694.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 23140513 is about 4810.4587099361. The cubic root of 23140513 is about 284.9646534598.

Adding to 23140513 its reverse (31504132), we get a palindrome (54644645).

It can be divided in two parts, 23140 and 513, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 23140513 in words is "twenty-three million, one hundred forty thousand, five hundred thirteen".