215271 has 32 divisors (see below), whose sum is σ = 391680. Its totient is φ = 114048.

The previous prime is 215261. The next prime is 215273. The reversal of 215271 is 172512.

It is not a de Polignac number, because 215271 - 2⁵ = 215239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3180 + ... + 3246.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2²¹⁵²⁷¹ is an apocalyptic number.

215271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

215271 is a deficient number, since it is larger than the sum of its proper divisors (176409).

215271 is a wasteful number, since it uses less digits than its factorization.

215271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 94 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 215271 is about 463.9730595627. The cubic root of 215271 is about 59.9324239198.

Adding to 215271 its reverse (172512), we get a palindrome (387783).

It can be divided in two parts, 21527 and 1, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 215271 in words is "two hundred fifteen thousand, two hundred seventy-one".