215342231 has 16 divisors (see below), whose sum is σ = 235435200. Its totient is φ = 195775488.

The previous prime is 215342177. The next prime is 215342273. The reversal of 215342231 is 132243512.

It is not a de Polignac number, because 215342231 - 2⁶ = 215342167 is a prime.

It is a super-2 number, since 2×215342231² = 92744552904114722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215342197 and 215342206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215342431) 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 15 ways as a sum of consecutive naturals, for example, 490310 + ... + 490748.

It is an arithmetic number, because the mean of its divisors is an integer number (14714700).

Almost surely, 2^215342231 is an apocalyptic number.

215342231 is a deficient number, since it is larger than the sum of its proper divisors (20092969).

215342231 is a wasteful number, since it uses less digits than its factorization.

215342231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938.

The product of its digits is 1440, while the sum is 23.

The square root of 215342231 is about 14674.5436385599. The cubic root of 215342231 is about 599.3903353545.

Adding to 215342231 its reverse (132243512), we get a palindrome (347585743).

The spelling of 215342231 in words is "two hundred fifteen million, three hundred forty-two thousand, two hundred thirty-one".