31210231000 has 128 divisors (see below), whose sum is σ = 78859085760. Its totient is φ = 11493120000.

The previous prime is 31210230983. The next prime is 31210231007. The reversal of 31210231000 is 13201213.

It is a super-2 number, since 2×31210231000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210231007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5210007 + ... + 5215993.

Almost surely, 2^31210231000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31210231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39429542880).

31210231000 is an abundant number, since it is smaller than the sum of its proper divisors (47648854760).

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

31210231000 is a wasteful number, since it uses less digits than its factorization.

31210231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6422 (or 6408 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31210231000 its reverse (13201213), we get a palindrome (31223432213).

The spelling of 31210231000 in words is "thirty-one billion, two hundred ten million, two hundred thirty-one thousand".