231811482081 has 8 divisors (see below), whose sum is σ = 309231371520. Its totient is φ = 154466290352.

The previous prime is 231811482079. The next prime is 231811482083. The reversal of 231811482081 is 180284118132.

It is an interprime number because it is at equal distance from previous prime (231811482079) and next prime (231811482083).

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 231811482081 - 2¹ = 231811482079 is a prime.

It is a super-2 number, since 2×231811482081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231811482083) 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, 18667185 + ... + 18679598.

It is an arithmetic number, because the mean of its divisors is an integer number (38653921440).

Almost surely, 2^231811482081 is an apocalyptic number.

It is an amenable number.

231811482081 is a deficient number, since it is larger than the sum of its proper divisors (77419889439).

231811482081 is a wasteful number, since it uses less digits than its factorization.

231811482081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37348855.

The product of its (nonzero) digits is 24576, while the sum is 39.

The spelling of 231811482081 in words is "two hundred thirty-one billion, eight hundred eleven million, four hundred eighty-two thousand, eighty-one".