215340275 has 12 divisors (see below), whose sum is σ = 282729672. Its totient is φ = 162138240.

The previous prime is 215340271. The next prime is 215340277. The reversal of 215340275 is 572043512.

It is a happy number.

It is not a de Polignac number, because 215340275 - 2² = 215340271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215340271) 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, 252917 + ... + 253766.

It is an arithmetic number, because the mean of its divisors is an integer number (23560806).

Almost surely, 2^215340275 is an apocalyptic number.

215340275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

215340275 is a deficient number, since it is larger than the sum of its proper divisors (67389397).

215340275 is a wasteful number, since it uses less digits than its factorization.

215340275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506710 (or 506705 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 215340275 is about 14674.4769923837. The cubic root of 215340275 is about 599.3885205517.

Adding to 215340275 its reverse (572043512), we get a palindrome (787383787).

The spelling of 215340275 in words is "two hundred fifteen million, three hundred forty thousand, two hundred seventy-five".