231125142013 has 4 divisors (see below), whose sum is σ = 244720738620. Its totient is φ = 217529545408.

The previous prime is 231125141999. The next prime is 231125142077. The reversal of 231125142013 is 310241521132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67406179129 + 163718962884 = 259627^2 + 404622^2 .

It is a cyclic number.

It is not a de Polignac number, because 231125142013 - 2²¹ = 231123044861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231125143013) 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, 6797798278 + ... + 6797798311.

It is an arithmetic number, because the mean of its divisors is an integer number (61180184655).

Almost surely, 2^231125142013 is an apocalyptic number.

It is an amenable number.

231125142013 is a deficient number, since it is larger than the sum of its proper divisors (13595596607).

231125142013 is a wasteful number, since it uses less digits than its factorization.

231125142013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13595596606.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 231125142013 its reverse (310241521132), we get a palindrome (541366663145).

The spelling of 231125142013 in words is "two hundred thirty-one billion, one hundred twenty-five million, one hundred forty-two thousand, thirteen".