215305343 has 12 divisors (see below), whose sum is σ = 242167464. Its totient is φ = 191175600.

The previous prime is 215305339. The next prime is 215305361. The reversal of 215305343 is 343503512.

It is not a de Polignac number, because 215305343 - 2² = 215305339 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215305373) 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 11 ways as a sum of consecutive naturals, for example, 15488 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (20180622).

Almost surely, 2^215305343 is an apocalyptic number.

215305343 is a deficient number, since it is larger than the sum of its proper divisors (26862121).

215305343 is a wasteful number, since it uses less digits than its factorization.

215305343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41446 (or 41435 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 215305343 is about 14673.2867142982. The cubic root of 215305343 is about 599.3561083271.

Adding to 215305343 its reverse (343503512), we get a palindrome (558808855).

The spelling of 215305343 in words is "two hundred fifteen million, three hundred five thousand, three hundred forty-three".