31919434 has 8 divisors (see below), whose sum is σ = 48353508. Its totient is φ = 15801600.

The previous prime is 31919431. The next prime is 31919467. The reversal of 31919434 is 43491913.

It can be written as a sum of positive squares in 2 ways, for example, as 28058209 + 3861225 = 5297^2 + 1965^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 31919434.

It is not an unprimeable number, because it can be changed into a prime (31919431) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 78807 + ... + 79210.

Almost surely, 2^31919434 is an apocalyptic number.

31919434 is a deficient number, since it is larger than the sum of its proper divisors (16434074).

31919434 is a wasteful number, since it uses less digits than its factorization.

31919434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158120.

The product of its digits is 11664, while the sum is 34.

The square root of 31919434 is about 5649.7286660511. The cubic root of 31919434 is about 317.2135478249.

The spelling of 31919434 in words is "thirty-one million, nine hundred nineteen thousand, four hundred thirty-four".