31132031002 has 4 divisors (see below), whose sum is σ = 46698046506. Its totient is φ = 15566015500.

The previous prime is 31132030999. The next prime is 31132031017. The reversal of 31132031002 is 20013023113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20013023113 = 51329 ⋅389897.

It can be written as a sum of positive squares in only one way, i.e., 25159987161 + 5972043841 = 158619^2 + 77279^2 .

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 as a sum of consecutive naturals, namely, 7783007749 + ... + 7783007752.

Almost surely, 2^31132031002 is an apocalyptic number.

31132031002 is a deficient number, since it is larger than the sum of its proper divisors (15566015504).

31132031002 is a wasteful number, since it uses less digits than its factorization.

31132031002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15566015503.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31132031002 its reverse (20013023113), we get a palindrome (51145054115).

The spelling of 31132031002 in words is "thirty-one billion, one hundred thirty-two million, thirty-one thousand, two".