215796839 has 12 divisors (see below), whose sum is σ = 222970104. Its totient is φ = 208846944.

The previous prime is 215796809. The next prime is 215796857. The reversal of 215796839 is 938697512.

It is not a de Polignac number, because 215796839 - 2¹² = 215792743 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215796809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387149 + ... + 387705.

It is an arithmetic number, because the mean of its divisors is an integer number (18580842).

Almost surely, 2^215796839 is an apocalyptic number.

215796839 is a deficient number, since it is larger than the sum of its proper divisors (7173265).

215796839 is an equidigital number, since it uses as much as digits as its factorization.

215796839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 877 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The square root of 215796839 is about 14690.0251531439. The cubic root of 215796839 is about 599.8118289552.

The spelling of 215796839 in words is "two hundred fifteen million, seven hundred ninety-six thousand, eight hundred thirty-nine".