31313132042 has 8 divisors (see below), whose sum is σ = 48239149476. Its totient is φ = 15233415552.

The previous prime is 31313132027. The next prime is 31313132063. The reversal of 31313132042 is 24023131313.

It can be written as a sum of positive squares in 2 ways, for example, as 28920063481 + 2393068561 = 170059^2 + 48919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31313131999 and 31313132017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211575143 + ... + 211575290.

Almost surely, 2^31313132042 is an apocalyptic number.

31313132042 is a deficient number, since it is larger than the sum of its proper divisors (16926017434).

31313132042 is a wasteful number, since it uses less digits than its factorization.

31313132042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423150472.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31313132042 its reverse (24023131313), we get a palindrome (55336263355).

The spelling of 31313132042 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty-two thousand, forty-two".