261545332 has 6 divisors (see below), whose sum is σ = 457704338. Its totient is φ = 130772664.

The previous prime is 261545329. The next prime is 261545353. The reversal of 261545332 is 233545162.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 242238096 + 19307236 = 15564^2 + 4394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 261545294 and 261545303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32693163 + ... + 32693170.

Almost surely, 2^261545332 is an apocalyptic number.

It is an amenable number.

261545332 is a deficient number, since it is larger than the sum of its proper divisors (196159006).

261545332 is a wasteful number, since it uses less digits than its factorization.

261545332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65386337 (or 65386335 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 261545332 is about 16172.3632163021. The cubic root of 261545332 is about 639.5124313863.

The spelling of 261545332 in words is "two hundred sixty-one million, five hundred forty-five thousand, three hundred thirty-two".