31125402002 has 8 divisors (see below), whose sum is σ = 47212688700. Its totient is φ = 15387839104.

The previous prime is 31125401971. The next prime is 31125402019. The reversal of 31125402002 is 20020452113.

It can be written as a sum of positive squares in 2 ways, for example, as 29029685161 + 2095716841 = 170381^2 + 45779^2 .

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

It is a super-2 number, since 2×31125402002² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87430727 + ... + 87431082.

Almost surely, 2^31125402002 is an apocalyptic number.

31125402002 is a deficient number, since it is larger than the sum of its proper divisors (16087286698).

31125402002 is a wasteful number, since it uses less digits than its factorization.

31125402002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174861900.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 31125402002 its reverse (20020452113), we get a palindrome (51145854115).

The spelling of 31125402002 in words is "thirty-one billion, one hundred twenty-five million, four hundred two thousand, two".