15980431 has 2 divisors, whose sum is σ = 15980432. Its totient is φ = 15980430.

The previous prime is 15980429. The next prime is 15980449. The reversal of 15980431 is 13408951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15980431 - 2¹ = 15980429 is a prime.

It is a super-2 number, since 2×15980431² = 510748349891522, which contains 22 as substring.

Together with 15980429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15980393 and 15980402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15987431) 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 as a sum of consecutive naturals, namely, 7990215 + 7990216.

It is an arithmetic number, because the mean of its divisors is an integer number (7990216).

Almost surely, 2^15980431 is an apocalyptic number.

15980431 is a deficient number, since it is larger than the sum of its proper divisors (1).

15980431 is an equidigital number, since it uses as much as digits as its factorization.

15980431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 15980431 is about 3997.5531266013. The cubic root of 15980431 is about 251.8814372558.

The spelling of 15980431 in words is "fifteen million, nine hundred eighty thousand, four hundred thirty-one".