31000213002 has 128 divisors (see below), whose sum is σ = 72405964800. Its totient is φ = 8749728000.

The previous prime is 31000212979. The next prime is 31000213033. The reversal of 31000213002 is 20031200013.

It is a happy number.

It is a super-2 number, since 2×31000213002² (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 63 ways as a sum of consecutive naturals, for example, 19883899 + ... + 19885457.

It is an arithmetic number, because the mean of its divisors is an integer number (565671600).

Almost surely, 2^31000213002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31000213002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36202982400).

31000213002 is an abundant number, since it is smaller than the sum of its proper divisors (41405751798).

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

31000213002 is a wasteful number, since it uses less digits than its factorization.

31000213002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852.

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

Adding to 31000213002 its reverse (20031200013), we get a palindrome (51031413015).

The spelling of 31000213002 in words is "thirty-one billion, two hundred thirteen thousand, two".