23140549 has 4 divisors (see below), whose sum is σ = 23157580. Its totient is φ = 23123520.

The previous prime is 23140531. The next prime is 23140571. The reversal of 23140549 is 94504132.

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 11512449 + 11628100 = 3393^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 23140549 - 2⁹ = 23140037 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 (23140589) 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, 6282 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (5789395).

Almost surely, 2^23140549 is an apocalyptic number.

It is an amenable number.

23140549 is a deficient number, since it is larger than the sum of its proper divisors (17031).

23140549 is a wasteful number, since it uses less digits than its factorization.

23140549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17030.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23140549 is about 4810.4624517815. The cubic root of 23140549 is about 284.9648012342.

The spelling of 23140549 in words is "twenty-three million, one hundred forty thousand, five hundred forty-nine".