261216112 has 10 divisors (see below), whose sum is σ = 506106248. Its totient is φ = 130608048.

The previous prime is 261216103. The next prime is 261216127. The reversal of 261216112 is 211612162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8162988 + ... + 8163019.

Almost surely, 2^261216112 is an apocalyptic number.

It is an amenable number.

261216112 is a deficient number, since it is larger than the sum of its proper divisors (244890136).

261216112 is a wasteful number, since it uses less digits than its factorization.

261216112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16326015 (or 16326009 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 261216112 is about 16162.1815359190. The cubic root of 261216112 is about 639.2439901158.

Adding to 261216112 its reverse (211612162), we get a palindrome (472828274).

The spelling of 261216112 in words is "two hundred sixty-one million, two hundred sixteen thousand, one hundred twelve".