231886550117 has 8 divisors (see below), whose sum is σ = 245791243800. Its totient is φ = 218011224064.

The previous prime is 231886550041. The next prime is 231886550143. The reversal of 231886550117 is 711055688132.

It is a Cunningham number, because it is equal to 481546²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 4471061956 + 227415488161 = 66866^2 + 476881^2 .

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 231886550117 - 2¹⁶ = 231886484581 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 (231886550177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7325642 + ... + 7357227.

It is an arithmetic number, because the mean of its divisors is an integer number (30723905475).

Almost surely, 2^231886550117 is an apocalyptic number.

It is an amenable number.

231886550117 is a deficient number, since it is larger than the sum of its proper divisors (13904693683).

231886550117 is a wasteful number, since it uses less digits than its factorization.

231886550117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14683815.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 231886550117 in words is "two hundred thirty-one billion, eight hundred eighty-six million, five hundred fifty thousand, one hundred seventeen".