215211016 has 16 divisors (see below), whose sum is σ = 403685100. Its totient is φ = 107561664.

The previous prime is 215211013. The next prime is 215211049. The reversal of 215211016 is 610112512.

It can be written as a sum of positive squares in 2 ways, for example, as 215208900 + 2116 = 14670^2 + 46^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215210984 and 215211002.

It is not an unprimeable number, because it can be changed into a prime (215211013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26046 + ... + 33298.

Almost surely, 2^215211016 is an apocalyptic number.

It is an amenable number.

215211016 is a deficient number, since it is larger than the sum of its proper divisors (188474084).

215211016 is a wasteful number, since it uses less digits than its factorization.

215211016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968 (or 10964 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 215211016 is about 14670.0721197955. The cubic root of 215211016 is about 599.2685679669.

Adding to 215211016 its reverse (610112512), we get a palindrome (825323528).

The spelling of 215211016 in words is "two hundred fifteen million, two hundred eleven thousand, sixteen".