23140345 has 4 divisors (see below), whose sum is σ = 27768420. Its totient is φ = 18512272.

The previous prime is 23140319. The next prime is 23140357. The reversal of 23140345 is 54304132.

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 12362256 + 10778089 = 3516^2 + 3283^2 .

It is a cyclic number.

It is not a de Polignac number, because 23140345 - 2⁷ = 23140217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314030 + ... + 2314039.

It is an arithmetic number, because the mean of its divisors is an integer number (6942105).

Almost surely, 2^23140345 is an apocalyptic number.

It is an amenable number.

23140345 is a deficient number, since it is larger than the sum of its proper divisors (4628075).

23140345 is an equidigital number, since it uses as much as digits as its factorization.

23140345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628074.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 23140345 is about 4810.4412479522. The cubic root of 23140345 is about 284.9639638442.

Adding to 23140345 its reverse (54304132), we get a palindrome (77444477).

The spelling of 23140345 in words is "twenty-three million, one hundred forty thousand, three hundred forty-five".