129312315 has 96 divisors (see below), whose sum is σ = 263854080. Its totient is φ = 59529600.

The previous prime is 129312307. The next prime is 129312317. The reversal of 129312315 is 513213921.

It is not a de Polignac number, because 129312315 - 2³ = 129312307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

129312315 is a Rhonda number in base 10.

Its product of digits (1620) is a multiple of the sum of its prime factors (162).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312317) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2439829 + ... + 2439881.

It is an arithmetic number, because the mean of its divisors is an integer number (2748480).

Almost surely, 2^129312315 is an apocalyptic number.

129312315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129312315 is an abundant number, since it is smaller than the sum of its proper divisors (134541765).

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

129312315 is a wasteful number, since it uses less digits than its factorization.

129312315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 103 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 129312315 is about 11371.5572812170. The cubic root of 129312315 is about 505.6848728123.

The spelling of 129312315 in words is "one hundred twenty-nine million, three hundred twelve thousand, three hundred fifteen".