31704142 has 4 divisors (see below), whose sum is σ = 47556216. Its totient is φ = 15852070.

The previous prime is 31704131. The next prime is 31704151. The reversal of 31704142 is 24140713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24140713 = 1907 ⋅12659.

It is a congruent number.

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, 7926034 + ... + 7926037.

It is an arithmetic number, because the mean of its divisors is an integer number (11889054).

Almost surely, 2^31704142 is an apocalyptic number.

31704142 is a deficient number, since it is larger than the sum of its proper divisors (15852074).

31704142 is a wasteful number, since it uses less digits than its factorization.

31704142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852073.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 31704142 is about 5630.6431249015. The cubic root of 31704142 is about 316.4987517285.

Adding to 31704142 its reverse (24140713), we get a palindrome (55844855).

The spelling of 31704142 in words is "thirty-one million, seven hundred four thousand, one hundred forty-two".