261132233 has 4 divisors (see below), whose sum is σ = 261577680. Its totient is φ = 260686788.

The previous prime is 261132197. The next prime is 261132247. The reversal of 261132233 is 332231162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332231162 = 2 ⋅166115581.

It is a cyclic number.

It is not a de Polignac number, because 261132233 - 2¹⁰ = 261131209 is a prime.

It is a super-2 number, since 2×261132233² = 136380086223132578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261132199 and 261132208.

It is not an unprimeable number, because it can be changed into a prime (261132283) 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, 221843 + ... + 223016.

It is an arithmetic number, because the mean of its divisors is an integer number (65394420).

Almost surely, 2^261132233 is an apocalyptic number.

It is an amenable number.

261132233 is a deficient number, since it is larger than the sum of its proper divisors (445447).

261132233 is an equidigital number, since it uses as much as digits as its factorization.

261132233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445446.

The product of its digits is 1296, while the sum is 23.

The square root of 261132233 is about 16159.5864117867. The cubic root of 261132233 is about 639.1755603311.

Adding to 261132233 its reverse (332231162), we get a palindrome (593363395).

The spelling of 261132233 in words is "two hundred sixty-one million, one hundred thirty-two thousand, two hundred thirty-three".