31752142 has 8 divisors (see below), whose sum is σ = 48915576. Its totient is φ = 15446952.

The previous prime is 31752139. The next prime is 31752169. The reversal of 31752142 is 24125713.

It is a happy number.

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

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 in 3 ways as a sum of consecutive naturals, for example, 214468 + ... + 214615.

It is an arithmetic number, because the mean of its divisors is an integer number (6114447).

Almost surely, 2^31752142 is an apocalyptic number.

31752142 is a deficient number, since it is larger than the sum of its proper divisors (17163434).

31752142 is a wasteful number, since it uses less digits than its factorization.

31752142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429122.

The product of its digits is 1680, while the sum is 25.

The square root of 31752142 is about 5634.9039033510. The cubic root of 31752142 is about 316.6583973218.

Adding to 31752142 its reverse (24125713), we get a palindrome (55877855).

The spelling of 31752142 in words is "thirty-one million, seven hundred fifty-two thousand, one hundred forty-two".