129318315 has 32 divisors (see below), whose sum is σ = 236974080. Its totient is φ = 58990464.

The previous prime is 129318311. The next prime is 129318323. The reversal of 129318315 is 513813921.

It is not a de Polignac number, because 129318315 - 2² = 129318311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129318311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62721 + ... + 64749.

It is an arithmetic number, because the mean of its divisors is an integer number (7405440).

Almost surely, 2^129318315 is an apocalyptic number.

129318315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129318315 is a deficient number, since it is larger than the sum of its proper divisors (107655765).

129318315 is a wasteful number, since it uses less digits than its factorization.

129318315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651.

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

The square root of 129318315 is about 11371.8210942663. The cubic root of 129318315 is about 505.6926938315.

The spelling of 129318315 in words is "one hundred twenty-nine million, three hundred eighteen thousand, three hundred fifteen".