261150233 has 4 divisors (see below), whose sum is σ = 261287268. Its totient is φ = 261013200.

The previous prime is 261150179. The next prime is 261150319. The reversal of 261150233 is 332051162.

261150233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69272329 + 191877904 = 8323^2 + 13852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261150233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261150199 and 261150208.

It is not an unprimeable number, because it can be changed into a prime (261150833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65618 + ... + 69483.

It is an arithmetic number, because the mean of its divisors is an integer number (65321817).

Almost surely, 2^261150233 is an apocalyptic number.

It is an amenable number.

261150233 is a deficient number, since it is larger than the sum of its proper divisors (137035).

261150233 is a wasteful number, since it uses less digits than its factorization.

261150233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137034.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 261150233 is about 16160.1433471365. The cubic root of 261150233 is about 639.1902462441.

The spelling of 261150233 in words is "two hundred sixty-one million, one hundred fifty thousand, two hundred thirty-three".