215320 has 32 divisors (see below), whose sum is σ = 554400. Its totient is φ = 73728.

The previous prime is 215317. The next prime is 215329. The reversal of 215320 is 23512.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 215320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105 + ... + 664.

It is an arithmetic number, because the mean of its divisors is an integer number (17325).

2²¹⁵³²⁰ is an apocalyptic number.

215320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215320 is an abundant number, since it is smaller than the sum of its proper divisors (339080).

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

215320 is a wasteful number, since it uses less digits than its factorization.

215320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 215320 is about 464.0258613483. The cubic root of 215320 is about 59.9369708490.

Adding to 215320 its reverse (23512), we get a palindrome (238832).

It can be divided in two parts, 215 and 320, that added together give a palindrome (535).

The spelling of 215320 in words is "two hundred fifteen thousand, three hundred twenty".