231226657 has 16 divisors (see below), whose sum is σ = 243360000. Its totient is φ = 219409344.

The previous prime is 231226621. The next prime is 231226663. The reversal of 231226657 is 756622132.

It is a cyclic number.

It is not a de Polignac number, because 231226657 - 2⁷ = 231226529 is a prime.

It is a Duffinian number.

Its product of digits (30240) is a multiple of the sum of its prime divisors (720).

It is not an unprimeable number, because it can be changed into a prime (231226607) by changing a digit.

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, 594219 + ... + 594607.

It is an arithmetic number, because the mean of its divisors is an integer number (15210000).

Almost surely, 2^231226657 is an apocalyptic number.

It is an amenable number.

231226657 is a deficient number, since it is larger than the sum of its proper divisors (12133343).

231226657 is a wasteful number, since it uses less digits than its factorization.

231226657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its digits is 30240, while the sum is 34.

The square root of 231226657 is about 15206.1387932637. The cubic root of 231226657 is about 613.7798595069.

Adding to 231226657 its reverse (756622132), we get a palindrome (987848789).

The spelling of 231226657 in words is "two hundred thirty-one million, two hundred twenty-six thousand, six hundred fifty-seven".