129513216 has 72 divisors (see below), whose sum is σ = 393952384. Its totient is φ = 37002240.

The previous prime is 129513179. The next prime is 129513221. The reversal of 129513216 is 612315921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6670 + ... + 17421.

Almost surely, 2^129513216 is an apocalyptic number.

129513216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129513216 is an abundant number, since it is smaller than the sum of its proper divisors (264439168).

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

129513216 is an equidigital number, since it uses as much as digits as its factorization.

129513216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24117 (or 24103 counting only the distinct ones).

The product of its digits is 3240, while the sum is 30.

The square root of 129513216 is about 11380.3873396295. The cubic root of 129513216 is about 505.9466164578.

The spelling of 129513216 in words is "one hundred twenty-nine million, five hundred thirteen thousand, two hundred sixteen".