31118474 has 4 divisors (see below), whose sum is σ = 46677714. Its totient is φ = 15559236.

The previous prime is 31118459. The next prime is 31118497. The reversal of 31118474 is 47481113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47481113 = 463 ⋅102551.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 5968249 = 5015^2 + 2443^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7779617 + ... + 7779620.

Almost surely, 2^31118474 is an apocalyptic number.

31118474 is a deficient number, since it is larger than the sum of its proper divisors (15559240).

31118474 is a wasteful number, since it uses less digits than its factorization.

31118474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15559239.

The product of its digits is 2688, while the sum is 29.

The square root of 31118474 is about 5578.3934963392. The cubic root of 31118474 is about 314.5377413902.

Adding to 31118474 its reverse (47481113), we get a palindrome (78599587).

The spelling of 31118474 in words is "thirty-one million, one hundred eighteen thousand, four hundred seventy-four".