261670226 has 4 divisors (see below), whose sum is σ = 392505342. Its totient is φ = 130835112.

The previous prime is 261670183. The next prime is 261670237. The reversal of 261670226 is 622076162.

261670226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 261630625 + 39601 = 16175^2 + 199^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 261670192 and 261670201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65417555 + ... + 65417558.

Almost surely, 2^261670226 is an apocalyptic number.

261670226 is a deficient number, since it is larger than the sum of its proper divisors (130835116).

261670226 is a wasteful number, since it uses less digits than its factorization.

261670226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130835115.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 261670226 is about 16176.2240958760. The cubic root of 261670226 is about 639.6142092246.

The spelling of 261670226 in words is "two hundred sixty-one million, six hundred seventy thousand, two hundred twenty-six".