231257261 has 8 divisors (see below), whose sum is σ = 238146048. Its totient is φ = 224428000.

The previous prime is 231257209. The next prime is 231257297. The reversal of 231257261 is 162752132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231257261 - 2⁶ = 231257197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231256261) 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, 6935 + ... + 22596.

It is an arithmetic number, because the mean of its divisors is an integer number (29768256).

Almost surely, 2^231257261 is an apocalyptic number.

It is an amenable number.

231257261 is a deficient number, since it is larger than the sum of its proper divisors (6888787).

231257261 is a wasteful number, since it uses less digits than its factorization.

231257261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29763.

The product of its digits is 5040, while the sum is 29.

The square root of 231257261 is about 15207.1450640809. The cubic root of 231257261 is about 613.8069372530.

The spelling of 231257261 in words is "two hundred thirty-one million, two hundred fifty-seven thousand, two hundred sixty-one".