216526039 has 4 divisors (see below), whose sum is σ = 221133024. Its totient is φ = 211919056.

The previous prime is 216526031. The next prime is 216526069. The reversal of 216526039 is 930625612.

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

It is a cyclic number.

It is not a de Polignac number, because 216526039 - 2³ = 216526031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216525995 and 216526013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216526031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303422 + ... + 2303515.

It is an arithmetic number, because the mean of its divisors is an integer number (55283256).

Almost surely, 2^216526039 is an apocalyptic number.

216526039 is a deficient number, since it is larger than the sum of its proper divisors (4606985).

216526039 is an equidigital number, since it uses as much as digits as its factorization.

216526039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606984.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 216526039 is about 14714.8237841980. The cubic root of 216526039 is about 600.4866782818.

The spelling of 216526039 in words is "two hundred sixteen million, five hundred twenty-six thousand, thirty-nine".