261230223 has 4 divisors (see below), whose sum is σ = 348306968. Its totient is φ = 174153480.

The previous prime is 261230213. The next prime is 261230257. The reversal of 261230223 is 322032162.

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

It is not a de Polignac number, because 261230223 - 2⁵ = 261230191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261230223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261230213) 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, 43538368 + ... + 43538373.

It is an arithmetic number, because the mean of its divisors is an integer number (87076742).

Almost surely, 2^261230223 is an apocalyptic number.

261230223 is a deficient number, since it is larger than the sum of its proper divisors (87076745).

261230223 is an equidigital number, since it uses as much as digits as its factorization.

261230223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87076744.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 261230223 is about 16162.6180738147. The cubic root of 261230223 is about 639.2555006481.

Adding to 261230223 its reverse (322032162), we get a palindrome (583262385).

It can be divided in two parts, 261 and 230223, that multiplied together give a triangular number (60088203 = T₁₀₉₆₂).

The spelling of 261230223 in words is "two hundred sixty-one million, two hundred thirty thousand, two hundred twenty-three".