215714129 has 4 divisors (see below), whose sum is σ = 217938084. Its totient is φ = 213490176.

The previous prime is 215714123. The next prime is 215714141. The reversal of 215714129 is 921417512.

215714129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52896529 + 162817600 = 7273^2 + 12760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215714129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215714095 and 215714104.

It is not an unprimeable number, because it can be changed into a prime (215714123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111832 + ... + 1112025.

It is an arithmetic number, because the mean of its divisors is an integer number (54484521).

Almost surely, 2^215714129 is an apocalyptic number.

It is an amenable number.

215714129 is a deficient number, since it is larger than the sum of its proper divisors (2223955).

215714129 is an equidigital number, since it uses as much as digits as its factorization.

215714129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223954.

The product of its digits is 5040, while the sum is 32.

The square root of 215714129 is about 14687.2097077695. The cubic root of 215714129 is about 599.7351877710.

The spelling of 215714129 in words is "two hundred fifteen million, seven hundred fourteen thousand, one hundred twenty-nine".