215487 has 16 divisors (see below), whose sum is σ = 334080. Its totient is φ = 137016.

The previous prime is 215483. The next prime is 215497. The reversal of 215487 is 784512.

It is not a de Polignac number, because 215487 - 2² = 215483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 215487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215483) 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, 448 + ... + 794.

It is an arithmetic number, because the mean of its divisors is an integer number (20880).

2²¹⁵⁴⁸⁷ is an apocalyptic number.

215487 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

215487 is a deficient number, since it is larger than the sum of its proper divisors (118593).

215487 is a wasteful number, since it uses less digits than its factorization.

215487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 373 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 215487 is about 464.2057733376. The cubic root of 215487 is about 59.9524623461.

Adding to 215487 its reverse (784512), we get a palindrome (999999).

The spelling of 215487 in words is "two hundred fifteen thousand, four hundred eighty-seven".