231201324431 has 16 divisors (see below), whose sum is σ = 300783656448. Its totient is φ = 172323967200.

The previous prime is 231201324377. The next prime is 231201324439. The reversal of 231201324431 is 134423102132.

It is not a de Polignac number, because 231201324431 - 2¹⁴ = 231201308047 is a prime.

It is a super-2 number, since 2×231201324431² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231201324431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201324439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65272460 + ... + 65276001.

It is an arithmetic number, because the mean of its divisors is an integer number (18798978528).

Almost surely, 2^231201324431 is an apocalyptic number.

231201324431 is a deficient number, since it is larger than the sum of its proper divisors (69582332017).

231201324431 is a wasteful number, since it uses less digits than its factorization.

231201324431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130548502.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 231201324431 its reverse (134423102132), we get a palindrome (365624426563).

The spelling of 231201324431 in words is "two hundred thirty-one billion, two hundred one million, three hundred twenty-four thousand, four hundred thirty-one".