261522832 has 40 divisors (see below), whose sum is σ = 537688800. Its totient is φ = 122798592.

The previous prime is 261522823. The next prime is 261522853. The reversal of 261522832 is 238225162.

It is a junction number, because it is equal to n+sod(n) for n = 261522794 and 261522803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178519 + ... + 179977.

It is an arithmetic number, because the mean of its divisors is an integer number (13442220).

Almost surely, 2^261522832 is an apocalyptic number.

It is an amenable number.

261522832 is an abundant number, since it is smaller than the sum of its proper divisors (276165968).

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

261522832 is a wasteful number, since it uses less digits than its factorization.

261522832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143 (or 2137 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 261522832 is about 16171.6675701673. The cubic root of 261522832 is about 639.4940923827.

Adding to 261522832 its reverse (238225162), we get a palindrome (499747994).

The spelling of 261522832 in words is "two hundred sixty-one million, five hundred twenty-two thousand, eight hundred thirty-two".