231355340202 has 16 divisors (see below), whose sum is σ = 528812206272. Its totient is φ = 66101525760.

The previous prime is 231355340197. The next prime is 231355340239. The reversal of 231355340202 is 202043553132.

It is a self number, because there is not a number n which added to its sum of digits gives 231355340202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2754230199 + ... + 2754230282.

It is an arithmetic number, because the mean of its divisors is an integer number (33050762892).

Almost surely, 2^231355340202 is an apocalyptic number.

231355340202 is an abundant number, since it is smaller than the sum of its proper divisors (297456866070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231355340202 is a wasteful number, since it uses less digits than its factorization.

231355340202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508460493.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 231355340202 its reverse (202043553132), we get a palindrome (433398893334).

The spelling of 231355340202 in words is "two hundred thirty-one billion, three hundred fifty-five million, three hundred forty thousand, two hundred two".