231990852241 has 4 divisors (see below), whose sum is σ = 232126600500. Its totient is φ = 231855103984.

The previous prime is 231990852227. The next prime is 231990852259. The reversal of 231990852241 is 142258099132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25002250641 + 206988601600 = 158121^2 + 454960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231990852241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231990852191 and 231990852200.

It is not an unprimeable number, because it can be changed into a prime (231990852271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67871566 + ... + 67874983.

It is an arithmetic number, because the mean of its divisors is an integer number (58031650125).

Almost surely, 2^231990852241 is an apocalyptic number.

It is an amenable number.

231990852241 is a deficient number, since it is larger than the sum of its proper divisors (135748259).

231990852241 is a wasteful number, since it uses less digits than its factorization.

231990852241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135748258.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 231990852241 in words is "two hundred thirty-one billion, nine hundred ninety million, eight hundred fifty-two thousand, two hundred forty-one".