261331332 has 24 divisors (see below), whose sum is σ = 611091936. Its totient is φ = 86922048.

The previous prime is 261331331. The next prime is 261331349. The reversal of 261331332 is 233133162.

It is a happy number.

261331332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (261331331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17713 + ... + 28920.

It is an arithmetic number, because the mean of its divisors is an integer number (25462164).

Almost surely, 2^261331332 is an apocalyptic number.

It is an amenable number.

261331332 is an abundant number, since it is smaller than the sum of its proper divisors (349760604).

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

261331332 is a wasteful number, since it uses less digits than its factorization.

261331332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47107 (or 47105 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

The square root of 261331332 is about 16165.7456369943. The cubic root of 261331332 is about 639.3379644950.

Adding to 261331332 its reverse (233133162), we get a palindrome (494464494).

The spelling of 261331332 in words is "two hundred sixty-one million, three hundred thirty-one thousand, three hundred thirty-two".