261610233 has 8 divisors (see below), whose sum is σ = 349188096. Its totient is φ = 174219600.

The previous prime is 261610213. The next prime is 261610241. The reversal of 261610233 is 332016162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261610233 - 2¹⁶ = 261544697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261610213) 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, 43513 + ... + 49158.

It is an arithmetic number, because the mean of its divisors is an integer number (43648512).

Almost surely, 2^261610233 is an apocalyptic number.

It is an amenable number.

261610233 is a deficient number, since it is larger than the sum of its proper divisors (87577863).

261610233 is an equidigital number, since it uses as much as digits as its factorization.

261610233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93615.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 261610233 is about 16174.3696322299. The cubic root of 261610233 is about 639.5653241466.

Adding to 261610233 its reverse (332016162), we get a palindrome (593626395).

The spelling of 261610233 in words is "two hundred sixty-one million, six hundred ten thousand, two hundred thirty-three".