231261261 has 32 divisors (see below), whose sum is σ = 387072000. Its totient is φ = 119311680.

The previous prime is 231261259. The next prime is 231261263. The reversal of 231261261 is 162162132.

It is an interprime number because it is at equal distance from previous prime (231261259) and next prime (231261263).

It is not a de Polignac number, because 231261261 - 2¹ = 231261259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231261263) 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 31 ways as a sum of consecutive naturals, for example, 31060 + ... + 37778.

It is an arithmetic number, because the mean of its divisors is an integer number (12096000).

Almost surely, 2^231261261 is an apocalyptic number.

231261261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231261261 is a deficient number, since it is larger than the sum of its proper divisors (155810739).

231261261 is a wasteful number, since it uses less digits than its factorization.

231261261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889.

The product of its digits is 864, while the sum is 24.

The square root of 231261261 is about 15207.2765806373. The cubic root of 231261261 is about 613.8104761885.

The spelling of 231261261 in words is "two hundred thirty-one million, two hundred sixty-one thousand, two hundred sixty-one".