216211270 has 96 divisors (see below), whose sum is σ = 473667264. Its totient is φ = 70625280.

The previous prime is 216211249. The next prime is 216211283. The reversal of 216211270 is 72112612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 472882 + ... + 473338.

It is an arithmetic number, because the mean of its divisors is an integer number (4934034).

Almost surely, 2^216211270 is an apocalyptic number.

216211270 is an abundant number, since it is smaller than the sum of its proper divisors (257455994).

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

216211270 is a wasteful number, since it uses less digits than its factorization.

216211270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 216211270 is about 14704.1242513793. The cubic root of 216211270 is about 600.1955566261.

Adding to 216211270 its reverse (72112612), we get a palindrome (288323882).

The spelling of 216211270 in words is "two hundred sixteen million, two hundred eleven thousand, two hundred seventy".