31314418042 has 4 divisors (see below), whose sum is σ = 46971627066. Its totient is φ = 15657209020.

The previous prime is 31314418039. The next prime is 31314418061. The reversal of 31314418042 is 24081441313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24081441313 = 241 ⋅99922993.

It can be written as a sum of positive squares in only one way, i.e., 30929905161 + 384512881 = 175869^2 + 19609^2 .

It is a super-2 number, since 2×31314418042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31314417995 and 31314418013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7828604509 + ... + 7828604512.

Almost surely, 2^31314418042 is an apocalyptic number.

31314418042 is a deficient number, since it is larger than the sum of its proper divisors (15657209024).

31314418042 is a wasteful number, since it uses less digits than its factorization.

31314418042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15657209023.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 31314418042 its reverse (24081441313), we get a palindrome (55395859355).

The spelling of 31314418042 in words is "thirty-one billion, three hundred fourteen million, four hundred eighteen thousand, forty-two".