31103313442 has 4 divisors (see below), whose sum is σ = 46654970166. Its totient is φ = 15551656720.

The previous prime is 31103313433. The next prime is 31103313473. The reversal of 31103313442 is 24431330113.

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., 25366614361 + 5736699081 = 159269^2 + 75741^2 .

It is a super-2 number, since 2×31103313442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775828359 + ... + 7775828362.

Almost surely, 2^31103313442 is an apocalyptic number.

31103313442 is a deficient number, since it is larger than the sum of its proper divisors (15551656724).

31103313442 is a wasteful number, since it uses less digits than its factorization.

31103313442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15551656723.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31103313442 its reverse (24431330113), we get a palindrome (55534643555).

The spelling of 31103313442 in words is "thirty-one billion, one hundred three million, three hundred thirteen thousand, four hundred forty-two".