215340241 has 16 divisors (see below), whose sum is σ = 234411408. Its totient is φ = 197017600.

The previous prime is 215340233. The next prime is 215340247. The reversal of 215340241 is 142043512.

It can be written as a sum of positive squares in 8 ways, for example, as 7403841 + 207936400 = 2721^2 + 14420^2 .

It is a cyclic number.

It is not a de Polignac number, because 215340241 - 2³ = 215340233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215340247) 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, 362841 + ... + 363433.

It is an arithmetic number, because the mean of its divisors is an integer number (14650713).

Almost surely, 2^215340241 is an apocalyptic number.

It is an amenable number.

215340241 is a deficient number, since it is larger than the sum of its proper divisors (19071167).

215340241 is a wasteful number, since it uses less digits than its factorization.

215340241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 215340241 is about 14674.4758339097. The cubic root of 215340241 is about 599.3884890059.

Adding to 215340241 its reverse (142043512), we get a palindrome (357383753).

The spelling of 215340241 in words is "two hundred fifteen million, three hundred forty thousand, two hundred forty-one".