129851331 has 8 divisors (see below), whose sum is σ = 173334720. Its totient is φ = 86467752.

The previous prime is 129851327. The next prime is 129851341. The reversal of 129851331 is 133158921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129851331 - 2² = 129851327 is a prime.

It is a super-2 number, since 2×129851331² = 33722736324943122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129851292 and 129851301.

It is not an unprimeable number, because it can be changed into a prime (129851311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21861 + ... + 27158.

It is an arithmetic number, because the mean of its divisors is an integer number (21666840).

Almost surely, 2^129851331 is an apocalyptic number.

129851331 is a deficient number, since it is larger than the sum of its proper divisors (43483389).

129851331 is an equidigital number, since it uses as much as digits as its factorization.

129851331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49905.

The product of its digits is 6480, while the sum is 33.

The square root of 129851331 is about 11395.2328190345. The cubic root of 129851331 is about 506.3865187682.

The spelling of 129851331 in words is "one hundred twenty-nine million, eight hundred fifty-one thousand, three hundred thirty-one".