243205104164031 has 12 divisors (see below), whose sum is σ = 351419049535320. Its totient is φ = 162080064740880.

The previous prime is 243205104163997. The next prime is 243205104164059. The reversal of 243205104164031 is 130461401502342.

243205104164031 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 0 + 5 + 1 + 0 + 4 + 1 + 640 + 3 + 1 = 666.

It is not a de Polignac number, because 243205104164031 - 2¹¹ = 243205104161983 is a prime.

It is a super-2 number, since 2×243205104164031² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243205104169031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4722586861 + ... + 4722638358.

It is an arithmetic number, because the mean of its divisors is an integer number (29284920794610).

Almost surely, 2^{243205104164031} is an apocalyptic number.

243205104164031 is a deficient number, since it is larger than the sum of its proper divisors (108213945371289).

243205104164031 is a wasteful number, since it uses less digits than its factorization.

243205104164031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9445228086 (or 9445228083 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 243205104164031 its reverse (130461401502342), we get a palindrome (373666505666373).

The spelling of 243205104164031 in words is "two hundred forty-three trillion, two hundred five billion, one hundred four million, one hundred sixty-four thousand, thirty-one".