231807512845 has 8 divisors (see below), whose sum is σ = 290263320576. Its totient is φ = 177383140176.

The previous prime is 231807512767. The next prime is 231807512851. The reversal of 231807512845 is 548215708132.

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 231807512845 - 2²¹ = 231805415693 is a prime.

It is a super-2 number, since 2×231807512845² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231807512795 and 231807512804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007858637 + ... + 1007858866.

It is an arithmetic number, because the mean of its divisors is an integer number (36282915072).

Almost surely, 2^231807512845 is an apocalyptic number.

It is an amenable number.

231807512845 is a deficient number, since it is larger than the sum of its proper divisors (58455807731).

231807512845 is a wasteful number, since it uses less digits than its factorization.

231807512845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015717531.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 231807512845 in words is "two hundred thirty-one billion, eight hundred seven million, five hundred twelve thousand, eight hundred forty-five".