215384 has 32 divisors (see below), whose sum is σ = 462000. Its totient is φ = 93312.

The previous prime is 215381. The next prime is 215389. The reversal of 215384 is 483512.

Added to its reverse (483512) it gives a square (698896 = 836²).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1922 + ... + 2030.

2²¹⁵³⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231000).

215384 is an abundant number, since it is smaller than the sum of its proper divisors (246616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215384 is a wasteful number, since it uses less digits than its factorization.

215384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 143 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 215384 is about 464.0948178982. The cubic root of 215384 is about 59.9429086565.

Adding to 215384 its reverse (483512), we get a palindrome (698896).

The spelling of 215384 in words is "two hundred fifteen thousand, three hundred eighty-four".