261513196 has 36 divisors (see below), whose sum is σ = 533507688. Its totient is φ = 111836928.

The previous prime is 261513181. The next prime is 261513199. The reversal of 261513196 is 691315162.

It is not an unprimeable number, because it can be changed into a prime (261513199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113916 + ... + 116188.

It is an arithmetic number, because the mean of its divisors is an integer number (14819658).

Almost surely, 2^261513196 is an apocalyptic number.

It is an amenable number.

261513196 is an abundant number, since it is smaller than the sum of its proper divisors (271994492).

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

261513196 is a wasteful number, since it uses less digits than its factorization.

261513196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878 (or 2869 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 261513196 is about 16171.3696389638. The cubic root of 261513196 is about 639.4862380771.

The spelling of 261513196 in words is "two hundred sixty-one million, five hundred thirteen thousand, one hundred ninety-six".