15040423 has 4 divisors (see below), whose sum is σ = 15360480. Its totient is φ = 14720368.

The previous prime is 15040391. The next prime is 15040429. The reversal of 15040423 is 32404051.

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

It is a cyclic number.

It is not a de Polignac number, because 15040423 - 2⁵ = 15040391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15040423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15040429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159958 + ... + 160051.

It is an arithmetic number, because the mean of its divisors is an integer number (3840120).

Almost surely, 2^15040423 is an apocalyptic number.

15040423 is a deficient number, since it is larger than the sum of its proper divisors (320057).

15040423 is an equidigital number, since it uses as much as digits as its factorization.

15040423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320056.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 15040423 is about 3878.1984219480. The cubic root of 15040423 is about 246.8425458165.

Adding to 15040423 its reverse (32404051), we get a palindrome (47444474).

The spelling of 15040423 in words is "fifteen million, forty thousand, four hundred twenty-three".