215020 has 24 divisors (see below), whose sum is σ = 486864. Its totient is φ = 79296.

The previous prime is 214993. The next prime is 215051. The reversal of 215020 is 20512.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 214988 and 215006.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 154 + ... + 673.

It is an arithmetic number, because the mean of its divisors is an integer number (20286).

2²¹⁵⁰²⁰ is an apocalyptic number.

215020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215020 is an abundant number, since it is smaller than the sum of its proper divisors (271844).

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

215020 is a wasteful number, since it uses less digits than its factorization.

215020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 215020 is about 463.7024908279. The cubic root of 215020 is about 59.9091216809.

Adding to 215020 its reverse (20512), we get a palindrome (235532).

It can be divided in two parts, 21 and 5020, that added together give a square (5041 = 71²).

The spelling of 215020 in words is "two hundred fifteen thousand, twenty".