31704242 has 4 divisors (see below), whose sum is σ = 47556366. Its totient is φ = 15852120.

The previous prime is 31704241. The next prime is 31704251. The reversal of 31704242 is 24240713.

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

It can be written as a sum of positive squares in only one way, i.e., 20421361 + 11282881 = 4519^2 + 3359^2 .

It is not an unprimeable number, because it can be changed into a prime (31704241) 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 as a sum of consecutive naturals, namely, 7926059 + ... + 7926062.

Almost surely, 2^31704242 is an apocalyptic number.

31704242 is a deficient number, since it is larger than the sum of its proper divisors (15852124).

31704242 is a wasteful number, since it uses less digits than its factorization.

31704242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15852123.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 31704242 is about 5630.6520048747. The cubic root of 31704242 is about 316.4990844910.

Adding to 31704242 its reverse (24240713), we get a palindrome (55944955).

The spelling of 31704242 in words is "thirty-one million, seven hundred four thousand, two hundred forty-two".