231002011309 has 4 divisors (see below), whose sum is σ = 232198913116. Its totient is φ = 229805109504.

The previous prime is 231002011291. The next prime is 231002011351. The reversal of 231002011309 is 903110200132.

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 81565646409 + 149436364900 = 285597^2 + 386570^2 .

It is a cyclic number.

It is not a de Polignac number, because 231002011309 - 2¹⁷ = 231001880237 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 231002011309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231002018309) 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, 598450614 + ... + 598450999.

It is an arithmetic number, because the mean of its divisors is an integer number (58049728279).

Almost surely, 2^231002011309 is an apocalyptic number.

It is an amenable number.

231002011309 is a deficient number, since it is larger than the sum of its proper divisors (1196901807).

231002011309 is a wasteful number, since it uses less digits than its factorization.

231002011309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196901806.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 231002011309 in words is "two hundred thirty-one billion, two million, eleven thousand, three hundred nine".