215211116 has 12 divisors (see below), whose sum is σ = 377252400. Its totient is φ = 107424720.

The previous prime is 215211107. The next prime is 215211121. The reversal of 215211116 is 611112512.

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, 42515 + ... + 47306.

It is an arithmetic number, because the mean of its divisors is an integer number (31437700).

Almost surely, 2^215211116 is an apocalyptic number.

It is an amenable number.

215211116 is a deficient number, since it is larger than the sum of its proper divisors (162041284).

215211116 is a wasteful number, since it uses less digits than its factorization.

215211116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90424 (or 90422 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 215211116 is about 14670.0755280946. The cubic root of 215211116 is about 599.2686607856.

Adding to 215211116 its reverse (611112512), we get a palindrome (826323628).

The spelling of 215211116 in words is "two hundred fifteen million, two hundred eleven thousand, one hundred sixteen".