261000332 has 12 divisors (see below), whose sum is σ = 461883240. Its totient is φ = 129033696.

The previous prime is 261000317. The next prime is 261000347. The reversal of 261000332 is 233000162.

261000332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (261000317) and next prime (261000347).

It is a super-3 number, since 3×261000332³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 261000332.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366218 + ... + 366929.

It is an arithmetic number, because the mean of its divisors is an integer number (38490270).

Almost surely, 2^261000332 is an apocalyptic number.

It is an amenable number.

261000332 is a deficient number, since it is larger than the sum of its proper divisors (200882908).

261000332 is a wasteful number, since it uses less digits than its factorization.

261000332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733240 (or 733238 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 261000332 is about 16155.5046965423. The cubic root of 261000332 is about 639.0679238110.

Adding to 261000332 its reverse (233000162), we get a palindrome (494000494).

The spelling of 261000332 in words is "two hundred sixty-one million, three hundred thirty-two", and thus it is an aban number.