261443234 has 16 divisors (see below), whose sum is σ = 431319168. Its totient is φ = 118098192.

The previous prime is 261443201. The next prime is 261443239. The reversal of 261443234 is 432344162.

It is a junction number, because it is equal to n+sod(n) for n = 261443197 and 261443206.

It is not an unprimeable number, because it can be changed into a prime (261443239) 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, 105752 + ... + 108195.

It is an arithmetic number, because the mean of its divisors is an integer number (26957448).

Almost surely, 2^261443234 is an apocalyptic number.

261443234 is a deficient number, since it is larger than the sum of its proper divisors (169875934).

261443234 is a wasteful number, since it uses less digits than its factorization.

261443234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214009.

The product of its digits is 13824, while the sum is 29.

The square root of 261443234 is about 16169.2063503439. The cubic root of 261443234 is about 639.4292062495.

Adding to 261443234 its reverse (432344162), we get a palindrome (693787396).

The spelling of 261443234 in words is "two hundred sixty-one million, four hundred forty-three thousand, two hundred thirty-four".