31431312203234 has 4 divisors (see below), whose sum is σ = 47146968304854. Its totient is φ = 15715656101616.

The previous prime is 31431312203227. The next prime is 31431312203267. The reversal of 31431312203234 is 43230221313413.

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

It can be written as a sum of positive squares in only one way, i.e., 23907180913009 + 7524131290225 = 4889497^2 + 2743015^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31431312203234.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857828050807 + ... + 7857828050810.

Almost surely, 2^{31431312203234} is an apocalyptic number.

31431312203234 is a deficient number, since it is larger than the sum of its proper divisors (15715656101620).

31431312203234 is a wasteful number, since it uses less digits than its factorization.

31431312203234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15715656101619.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 31431312203234 its reverse (43230221313413), we get a palindrome (74661533516647).

The spelling of 31431312203234 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred twelve million, two hundred three thousand, two hundred thirty-four".