31421134431 has 6 divisors (see below), whose sum is σ = 45386083080. Its totient is φ = 20947422948.

The previous prime is 31421134403. The next prime is 31421134439. The reversal of 31421134431 is 13443112413.

31421134431 is a `hidden beast` number, since 3 + 1 + 4 + 211 + 3 + 443 + 1 = 666.

It is not a de Polignac number, because 31421134431 - 2⁵ = 31421134399 is a prime.

It is a super-2 number, since 2×31421134431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31421134395 and 31421134404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421134439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1745618571 + ... + 1745618588.

It is an arithmetic number, because the mean of its divisors is an integer number (7564347180).

Almost surely, 2^31421134431 is an apocalyptic number.

31421134431 is a deficient number, since it is larger than the sum of its proper divisors (13964948649).

31421134431 is a wasteful number, since it uses less digits than its factorization.

31421134431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491237165 (or 3491237162 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 31421134431 its reverse (13443112413), we get a palindrome (44864246844).

The spelling of 31421134431 in words is "thirty-one billion, four hundred twenty-one million, one hundred thirty-four thousand, four hundred thirty-one".