231079219849 has 3 divisors (see below), whose sum is σ = 231079700557. Its totient is φ = 231078739142.

The previous prime is 231079219841. The next prime is 231079219859. The reversal of 231079219849 is 948912970132.

It is a happy number.

The square root of 231079219849 is 480707.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 231079219849 - 2³ = 231079219841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231079219849.

It is not an unprimeable number, because it can be changed into a prime (231079219841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 240354 + ... + 721060.

Almost surely, 2^231079219849 is an apocalyptic number.

231079219849 is the 480707-th square number.

231079219849 is the 240354-th centered octagonal number.

It is an amenable number.

231079219849 is a deficient number, since it is larger than the sum of its proper divisors (480708).

231079219849 is an frugal number, since it uses more digits than its factorization.

231079219849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961414 (or 480707 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 231079219849 in words is "two hundred thirty-one billion, seventy-nine million, two hundred nineteen thousand, eight hundred forty-nine".