31242103431 has 16 divisors (see below), whose sum is σ = 51934925568. Its totient is φ = 16229664000.

The previous prime is 31242103421. The next prime is 31242103439. The reversal of 31242103431 is 13430124213.

It is a happy number.

It is not a de Polignac number, because 31242103431 - 2¹⁸ = 31241841287 is a prime.

It is a super-2 number, since 2×31242103431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242103439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67623370 + ... + 67623831.

It is an arithmetic number, because the mean of its divisors is an integer number (3245932848).

Almost surely, 2^31242103431 is an apocalyptic number.

31242103431 is a deficient number, since it is larger than the sum of its proper divisors (20692822137).

31242103431 is a wasteful number, since it uses less digits than its factorization.

31242103431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135247222.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31242103431 its reverse (13430124213), we get a palindrome (44672227644).

The spelling of 31242103431 in words is "thirty-one billion, two hundred forty-two million, one hundred three thousand, four hundred thirty-one".