215212 has 12 divisors (see below), whose sum is σ = 380016. Its totient is φ = 106640.

The previous prime is 215197. The next prime is 215239. The reversal of 215212 is 212512.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 215192 and 215201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (31668).

2²¹⁵²¹² is an apocalyptic number.

It is an amenable number.

215212 is a deficient number, since it is larger than the sum of its proper divisors (164804).

215212 is a wasteful number, since it uses less digits than its factorization.

215212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 486 counting only the distinct ones).

The product of its digits is 40, while the sum is 13.

The square root of 215212 is about 463.9094739278. The cubic root of 215212 is about 59.9269481302.

Adding to 215212 its reverse (212512), we get a palindrome (427724).

The spelling of 215212 in words is "two hundred fifteen thousand, two hundred twelve".