3131440423 has 4 divisors (see below), whose sum is σ = 3131585928. Its totient is φ = 3131294920.

The previous prime is 3131440421. The next prime is 3131440441. The reversal of 3131440423 is 3240441313.

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 3131440423 - 2¹ = 3131440421 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 (3131440421) 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, 33361 + ... + 85882.

It is an arithmetic number, because the mean of its divisors is an integer number (782896482).

Almost surely, 2^3131440423 is an apocalyptic number.

3131440423 is a deficient number, since it is larger than the sum of its proper divisors (145505).

3131440423 is a wasteful number, since it uses less digits than its factorization.

3131440423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145504.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 3131440423 is about 55959.2746825761. The cubic root of 3131440423 is about 1463.0125485074.

Adding to 3131440423 its reverse (3240441313), we get a palindrome (6371881736).

The spelling of 3131440423 in words is "three billion, one hundred thirty-one million, four hundred forty thousand, four hundred twenty-three".