215134429 has 2 divisors, whose sum is σ = 215134430. Its totient is φ = 215134428.

The previous prime is 215134427. The next prime is 215134453. The reversal of 215134429 is 924431512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155875225 + 59259204 = 12485^2 + 7698^2 .

It is a cyclic number.

It is not a de Polignac number, because 215134429 - 2¹ = 215134427 is a prime.

Together with 215134427, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 215134429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215134427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107567214 + 107567215.

It is an arithmetic number, because the mean of its divisors is an integer number (107567215).

Almost surely, 2^215134429 is an apocalyptic number.

It is an amenable number.

215134429 is a deficient number, since it is larger than the sum of its proper divisors (1).

215134429 is an equidigital number, since it uses as much as digits as its factorization.

215134429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 215134429 is about 14667.4615731557. The cubic root of 215134429 is about 599.1974724315.

The spelling of 215134429 in words is "two hundred fifteen million, one hundred thirty-four thousand, four hundred twenty-nine".