31431212231332 has 24 divisors (see below), whose sum is σ = 55300699651736. Its totient is φ = 15631044968448.

The previous prime is 31431212231299. The next prime is 31431212231333. The reversal of 31431212231332 is 23313221213413.

It can be written as a sum of positive squares in 4 ways, for example, as 1258668585216 + 30172543646116 = 1121904^2 + 5492954^2 .

It is a super-2 number, since 2×31431212231332² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31431212231294 and 31431212231303.

It is not an unprimeable number, because it can be changed into a prime (31431212231333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222513 + ... + 7931704.

Almost surely, 2^{31431212231332} is an apocalyptic number.

It is an amenable number.

31431212231332 is a deficient number, since it is larger than the sum of its proper divisors (23869487420404).

31431212231332 is a wasteful number, since it uses less digits than its factorization.

31431212231332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8159407 (or 8159405 counting only the distinct ones).

The product of its digits is 15552, while the sum is 31.

Adding to 31431212231332 its reverse (23313221213413), we get a palindrome (54744433444745).

The spelling of 31431212231332 in words is "thirty-one trillion, four hundred thirty-one billion, two hundred twelve million, two hundred thirty-one thousand, three hundred thirty-two".