31189442 has 8 divisors (see below), whose sum is σ = 48397500. Its totient is φ = 15056944.

The previous prime is 31189439. The next prime is 31189451. The reversal of 31189442 is 24498113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30151081 + 1038361 = 5491^2 + 1019^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31189399 and 31189408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268817 + ... + 268932.

Almost surely, 2^31189442 is an apocalyptic number.

31189442 is a deficient number, since it is larger than the sum of its proper divisors (17208058).

31189442 is a wasteful number, since it uses less digits than its factorization.

31189442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537780.

The product of its digits is 6912, while the sum is 32.

The square root of 31189442 is about 5584.7508449348. The cubic root of 31189442 is about 314.7766687748.

The spelling of 31189442 in words is "thirty-one million, one hundred eighty-nine thousand, four hundred forty-two".