231261226 has 16 divisors (see below), whose sum is σ = 401880384. Its totient is φ = 97753824.

The previous prime is 231261143. The next prime is 231261227. The reversal of 231261226 is 622162132.

It is a self number, because there is not a number n which added to its sum of digits gives 231261226.

It is not an unprimeable number, because it can be changed into a prime (231261227) 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, 112120 + ... + 114163.

It is an arithmetic number, because the mean of its divisors is an integer number (25117524).

Almost surely, 2^231261226 is an apocalyptic number.

231261226 is a deficient number, since it is larger than the sum of its proper divisors (170619158).

231261226 is a wasteful number, since it uses less digits than its factorization.

231261226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226365.

The product of its digits is 1728, while the sum is 25.

The square root of 231261226 is about 15207.2754298724. The cubic root of 231261226 is about 613.8104452230.

The spelling of 231261226 in words is "two hundred thirty-one million, two hundred sixty-one thousand, two hundred twenty-six".