243161475931 has 4 divisors (see below), whose sum is σ = 265267064664. Its totient is φ = 221055887200.

The previous prime is 243161475913. The next prime is 243161475941. The reversal of 243161475931 is 139574161342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243161475931 - 2¹⁵ = 243161443163 is a prime.

It is a super-2 number, since 2×243161475931² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243161475911) 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, 11052794350 + ... + 11052794371.

It is an arithmetic number, because the mean of its divisors is an integer number (66316766166).

Almost surely, 2^243161475931 is an apocalyptic number.

243161475931 is a deficient number, since it is larger than the sum of its proper divisors (22105588733).

243161475931 is a wasteful number, since it uses less digits than its factorization.

243161475931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22105588732.

The product of its digits is 544320, while the sum is 46.

The spelling of 243161475931 in words is "two hundred forty-three billion, one hundred sixty-one million, four hundred seventy-five thousand, nine hundred thirty-one".