31713118 has 4 divisors (see below), whose sum is σ = 47569680. Its totient is φ = 15856558.

The previous prime is 31713061. The next prime is 31713127. The reversal of 31713118 is 81131713.

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

It is a junction number, because it is equal to n+sod(n) for n = 31713092 and 31713101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7928278 + ... + 7928281.

It is an arithmetic number, because the mean of its divisors is an integer number (11892420).

Almost surely, 2^31713118 is an apocalyptic number.

31713118 is a deficient number, since it is larger than the sum of its proper divisors (15856562).

31713118 is a wasteful number, since it uses less digits than its factorization.

31713118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15856561.

The product of its digits is 504, while the sum is 25.

The square root of 31713118 is about 5631.4401355248. The cubic root of 31713118 is about 316.5286176972.

The spelling of 31713118 in words is "thirty-one million, seven hundred thirteen thousand, one hundred eighteen".