231319635849 has 9 divisors (see below), whose sum is σ = 334130447053. Its totient is φ = 154212128652.

The previous prime is 231319635793. The next prime is 231319635853. The reversal of 231319635849 is 948536913132.

The square root of 231319635849 is 480957.

It is a perfect power (a square), and thus also a powerful number.

231319635849 is a `hidden beast` number, since 23 + 1 + 31 + 9 + 6 + 3 + 584 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 231319635849 - 2¹⁹ = 231319111561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231319635795 and 231319635804.

It is not an unprimeable number, because it can be changed into a prime (231319635049) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1362712 + ... + 1523030.

Almost surely, 2^231319635849 is an apocalyptic number.

231319635849 is the 480957-th square number.

231319635849 is the 240479-th centered octagonal number.

It is an amenable number.

231319635849 is a deficient number, since it is larger than the sum of its proper divisors (102810811204).

231319635849 is an frugal number, since it uses more digits than its factorization.

231319635849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320644 (or 160322 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 231319635849 in words is "two hundred thirty-one billion, three hundred nineteen million, six hundred thirty-five thousand, eight hundred forty-nine".