231612261 has 8 divisors (see below), whose sum is σ = 325069920. Its totient is φ = 146281392.

The previous prime is 231612259. The next prime is 231612331. The reversal of 231612261 is 162216132.

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

It is not a de Polignac number, because 231612261 - 2¹ = 231612259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231612221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2031630 + ... + 2031743.

It is an arithmetic number, because the mean of its divisors is an integer number (40633740).

Almost surely, 2^231612261 is an apocalyptic number.

It is an amenable number.

231612261 is a deficient number, since it is larger than the sum of its proper divisors (93457659).

231612261 is a wasteful number, since it uses less digits than its factorization.

231612261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063395.

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

The square root of 231612261 is about 15218.8127329303. The cubic root of 231612261 is about 614.1208590121.

Adding to 231612261 its reverse (162216132), we get a palindrome (393828393).

The spelling of 231612261 in words is "two hundred thirty-one million, six hundred twelve thousand, two hundred sixty-one".