15939043231 has 2 divisors, whose sum is σ = 15939043232. Its totient is φ = 15939043230.

The previous prime is 15939043229. The next prime is 15939043271. The reversal of 15939043231 is 13234093951.

It is a happy number.

It is an a-pointer prime, because the next prime (15939043271) can be obtained adding 15939043231 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15939043231 - 2¹ = 15939043229 is a prime.

It is a super-2 number, since 2×15939043231² (a number of 21 digits) contains 22 as substring.

Together with 15939043229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15939043271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7969521615 + 7969521616.

It is an arithmetic number, because the mean of its divisors is an integer number (7969521616).

Almost surely, 2^15939043231 is an apocalyptic number.

15939043231 is a deficient number, since it is larger than the sum of its proper divisors (1).

15939043231 is an equidigital number, since it uses as much as digits as its factorization.

15939043231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 15939043231 in words is "fifteen billion, nine hundred thirty-nine million, forty-three thousand, two hundred thirty-one".