129310218 has 24 divisors (see below), whose sum is σ = 280421856. Its totient is φ = 43065000.

The previous prime is 129310169. The next prime is 129310267. The reversal of 129310218 is 812013921.

It is an interprime number because it is at equal distance from previous prime (129310169) and next prime (129310267).

It is a super-2 number, since 2×129310218² = 33442264958415048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129310191 and 129310200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23643 + ... + 28593.

It is an arithmetic number, because the mean of its divisors is an integer number (11684244).

Almost surely, 2^129310218 is an apocalyptic number.

129310218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129310218 is an abundant number, since it is smaller than the sum of its proper divisors (151111638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129310218 is a wasteful number, since it uses less digits than its factorization.

129310218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410 (or 6407 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 129310218 is about 11371.4650771130. The cubic root of 129310218 is about 505.6821393090.

It can be divided in two parts, 1293 and 10218, that added together give a palindrome (11511).

The spelling of 129310218 in words is "one hundred twenty-nine million, three hundred ten thousand, two hundred eighteen".