261202116 has 24 divisors (see below), whose sum is σ = 696539200. Its totient is φ = 74629152.

The previous prime is 261202091. The next prime is 261202133. The reversal of 261202116 is 611202162.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 261202092 and 261202101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554691 + ... + 1554858.

Almost surely, 2^261202116 is an apocalyptic number.

It is an amenable number.

261202116 is an abundant number, since it is smaller than the sum of its proper divisors (435337084).

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

261202116 is a wasteful number, since it uses less digits than its factorization.

261202116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109563 (or 3109561 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 261202116 is about 16161.7485440159. The cubic root of 261202116 is about 639.2325729810.

Adding to 261202116 its reverse (611202162), we get a palindrome (872404278).

The spelling of 261202116 in words is "two hundred sixty-one million, two hundred two thousand, one hundred sixteen".