215240529 has 16 divisors (see below), whose sum is σ = 335986560. Its totient is φ = 119994240.

The previous prime is 215240449. The next prime is 215240551. The reversal of 215240529 is 925042512.

215240529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215240529 - 2⁹ = 215240017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215240496 and 215240505.

It is not an unprimeable number, because it can be changed into a prime (215240329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124134 + ... + 125855.

It is an arithmetic number, because the mean of its divisors is an integer number (20999160).

Almost surely, 2^215240529 is an apocalyptic number.

It is an amenable number.

215240529 is a deficient number, since it is larger than the sum of its proper divisors (120746031).

215240529 is a wasteful number, since it uses less digits than its factorization.

215240529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250040.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 215240529 is about 14671.0779767541. The cubic root of 215240529 is about 599.2959603144.

The spelling of 215240529 in words is "two hundred fifteen million, two hundred forty thousand, five hundred twenty-nine".