215029139 has 16 divisors (see below), whose sum is σ = 243093312. Its totient is φ = 188715648.

The previous prime is 215029123. The next prime is 215029147. The reversal of 215029139 is 931920512.

It is a cyclic number.

It is not a de Polignac number, because 215029139 - 2⁴ = 215029123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215029159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49649 + ... + 53805.

It is an arithmetic number, because the mean of its divisors is an integer number (15193332).

Almost surely, 2^215029139 is an apocalyptic number.

215029139 is a deficient number, since it is larger than the sum of its proper divisors (28064173).

215029139 is a wasteful number, since it uses less digits than its factorization.

215029139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 215029139 is about 14663.8718966036. The cubic root of 215029139 is about 599.0997044184.

The spelling of 215029139 in words is "two hundred fifteen million, twenty-nine thousand, one hundred thirty-nine".