129193215 has 16 divisors (see below), whose sum is σ = 207163008. Its totient is φ = 68751776.

The previous prime is 129193193. The next prime is 129193223. The reversal of 129193215 is 512391921.

It is a cyclic number.

It is not a de Polignac number, because 129193215 - 2⁷ = 129193087 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2217 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (12947688).

Almost surely, 2^129193215 is an apocalyptic number.

129193215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129193215 is a deficient number, since it is larger than the sum of its proper divisors (77969793).

129193215 is a wasteful number, since it uses less digits than its factorization.

129193215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18918.

The product of its digits is 4860, while the sum is 33.

The square root of 129193215 is about 11366.3193250938. The cubic root of 129193215 is about 505.5295754918.

The spelling of 129193215 in words is "one hundred twenty-nine million, one hundred ninety-three thousand, two hundred fifteen".