261256226 has 32 divisors (see below), whose sum is σ = 492939648. Its totient is φ = 100880640.

The previous prime is 261256183. The next prime is 261256243. The reversal of 261256226 is 622652162.

It is a junction number, because it is equal to n+sod(n) for n = 261256192 and 261256201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9896 + ... + 24908.

It is an arithmetic number, because the mean of its divisors is an integer number (15404364).

Almost surely, 2^261256226 is an apocalyptic number.

261256226 is a deficient number, since it is larger than the sum of its proper divisors (231683422).

261256226 is a wasteful number, since it uses less digits than its factorization.

261256226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15146.

The product of its digits is 17280, while the sum is 32.

The square root of 261256226 is about 16163.4224717416. The cubic root of 261256226 is about 639.2767105591.

It can be divided in two parts, 261256 and 226, that multiplied together give a square (59043856 = 7684²).

The spelling of 261256226 in words is "two hundred sixty-one million, two hundred fifty-six thousand, two hundred twenty-six".