231545434304202 has 16 divisors (see below), whose sum is σ = 463094103096000. Its totient is φ = 77181272353472.

The previous prime is 231545434304179. The next prime is 231545434304207. The reversal of 231545434304202 is 202403434545132.

It is a super-2 number, since 2×231545434304202² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231545434304207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133839198 + ... + 135558185.

It is an arithmetic number, because the mean of its divisors is an integer number (28943381443500).

Almost surely, 2^{231545434304202} is an apocalyptic number.

231545434304202 is an abundant number, since it is smaller than the sum of its proper divisors (231548668791798).

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

231545434304202 is a wasteful number, since it uses less digits than its factorization.

231545434304202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269540637.

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 231545434304202 its reverse (202403434545132), we get a palindrome (433948868849334).

The spelling of 231545434304202 in words is "two hundred thirty-one trillion, five hundred forty-five billion, four hundred thirty-four million, three hundred four thousand, two hundred two".