215471 has 2 divisors, whose sum is σ = 215472. Its totient is φ = 215470.

The previous prime is 215461. The next prime is 215483. The reversal of 215471 is 174512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215471 is a prime.

It is a super-3 number, since 3×215471³ = 30011502350796333, which contains 333 as substring.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107735 + 107736.

It is an arithmetic number, because the mean of its divisors is an integer number (107736).

2²¹⁵⁴⁷¹ is an apocalyptic number.

215471 is a deficient number, since it is larger than the sum of its proper divisors (1).

215471 is an equidigital number, since it uses as much as digits as its factorization.

215471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 20.

The square root of 215471 is about 464.1885392812. The cubic root of 215471 is about 59.9509784776.

Adding to 215471 its reverse (174512), we get a palindrome (389983).

It can be divided in two parts, 215 and 471, that added together give a palindrome (686).

The spelling of 215471 in words is "two hundred fifteen thousand, four hundred seventy-one".