31031402002 has 8 divisors (see below), whose sum is σ = 46547858700. Its totient is φ = 15515449104.

The previous prime is 31031401991. The next prime is 31031402023. The reversal of 31031402002 is 20020413013.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26886488841 + 4144913161 = 163971^2 + 64381^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142324 + ... + 286912.

Almost surely, 2^31031402002 is an apocalyptic number.

31031402002 is a deficient number, since it is larger than the sum of its proper divisors (15516456698).

31031402002 is a wasteful number, since it uses less digits than its factorization.

31031402002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251900.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31031402002 its reverse (20020413013), we get a palindrome (51051815015).

The spelling of 31031402002 in words is "thirty-one billion, thirty-one million, four hundred two thousand, two".