31340002 has 4 divisors (see below), whose sum is σ = 47010006. Its totient is φ = 15670000.

The previous prime is 31339967. The next prime is 31340003. The reversal of 31340002 is 20004313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20004313 = 7 ⋅2857759.

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 11350161 = 4471^2 + 3369^2 .

It is not an unprimeable number, because it can be changed into a prime (31340003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7834999 + ... + 7835002.

Almost surely, 2^31340002 is an apocalyptic number.

31340002 is a deficient number, since it is larger than the sum of its proper divisors (15670004).

31340002 is a wasteful number, since it uses less digits than its factorization.

31340002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15670003.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31340002 is about 5598.2141795398. The cubic root of 31340002 is about 315.2823604102.

Adding to 31340002 its reverse (20004313), we get a palindrome (51344315).

The spelling of 31340002 in words is "thirty-one million, three hundred forty thousand, two".