215401339 has 4 divisors (see below), whose sum is σ = 228072024. Its totient is φ = 202730656.

The previous prime is 215401337. The next prime is 215401343. The reversal of 215401339 is 933104512.

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 215401339 - 2¹ = 215401337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215401337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6335317 + ... + 6335350.

It is an arithmetic number, because the mean of its divisors is an integer number (57018006).

Almost surely, 2^215401339 is an apocalyptic number.

215401339 is a deficient number, since it is larger than the sum of its proper divisors (12670685).

215401339 is a wasteful number, since it uses less digits than its factorization.

215401339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12670684.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 215401339 is about 14676.5574642012. The cubic root of 215401339 is about 599.4451713594.

The spelling of 215401339 in words is "two hundred fifteen million, four hundred one thousand, three hundred thirty-nine".