31100040002 has 4 divisors (see below), whose sum is σ = 46650060006. Its totient is φ = 15550020000.

The previous prime is 31100039963. The next prime is 31100040061. The reversal of 31100040002 is 20004000113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20004000113 = 17 ⋅1176705889.

It can be written as a sum of positive squares in only one way, i.e., 24270835681 + 6829204321 = 155791^2 + 82639^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775009999 + ... + 7775010002.

Almost surely, 2^31100040002 is an apocalyptic number.

31100040002 is a deficient number, since it is larger than the sum of its proper divisors (15550020004).

31100040002 is a wasteful number, since it uses less digits than its factorization.

31100040002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15550020003.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 31100040002 its reverse (20004000113), we get a palindrome (51104040115).

The spelling of 31100040002 in words is "thirty-one billion, one hundred million, forty thousand, two".