31321000002 has 8 divisors (see below), whose sum is σ = 62642000016. Its totient is φ = 10440333332.

The previous prime is 31321000001. The next prime is 31321000003. The reversal of 31321000002 is 20000012313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31321000001) and next prime (31321000003).

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

31321000002 is an admirable number.

It is a super-2 number, since 2×31321000002² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31321000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2610083328 + ... + 2610083339.

It is an arithmetic number, because the mean of its divisors is an integer number (7830250002).

Almost surely, 2^31321000002 is an apocalyptic number.

31321000002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31321000002 is a wasteful number, since it uses less digits than its factorization.

31321000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220166672.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31321000002 its reverse (20000012313), we get a palindrome (51321012315).

The spelling of 31321000002 in words is "thirty-one billion, three hundred twenty-one million, two", and thus it is an aban number.