261143216 has 10 divisors (see below), whose sum is σ = 505965012. Its totient is φ = 130571600.

The previous prime is 261143209. The next prime is 261143221. The reversal of 261143216 is 612341162.

261143216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160710 + ... + 8160741.

Almost surely, 2^261143216 is an apocalyptic number.

It is an amenable number.

261143216 is a deficient number, since it is larger than the sum of its proper divisors (244821796).

261143216 is a wasteful number, since it uses less digits than its factorization.

261143216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16321459 (or 16321453 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 261143216 is about 16159.9262374554. The cubic root of 261143216 is about 639.1845212660.

Adding to 261143216 its reverse (612341162), we get a palindrome (873484378).

The spelling of 261143216 in words is "two hundred sixty-one million, one hundred forty-three thousand, two hundred sixteen".