16129231 has 2 divisors, whose sum is σ = 16129232. Its totient is φ = 16129230.

The previous prime is 16129229. The next prime is 16129241. The reversal of 16129231 is 13292161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16129231 - 2¹ = 16129229 is a prime.

It is a super-2 number, since 2×16129231² = 520304185302722, which contains 22 as substring.

Together with 16129229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 16129196 and 16129205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16129241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8064615 + 8064616.

It is an arithmetic number, because the mean of its divisors is an integer number (8064616).

Almost surely, 2^16129231 is an apocalyptic number.

16129231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16129231 is an equidigital number, since it uses as much as digits as its factorization.

16129231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 16129231 is about 4016.1213876077. The cubic root of 16129231 is about 252.6608118501.

It can be divided in two parts, 161 and 29231, that added together give a palindrome (29392).

The spelling of 16129231 in words is "sixteen million, one hundred twenty-nine thousand, two hundred thirty-one".