31030231000 has 64 divisors (see below), whose sum is σ = 72732965760. Its totient is φ = 12391200000.

The previous prime is 31030230989. The next prime is 31030231003. The reversal of 31030231000 is 13203013.

It is a super-2 number, since 2×31030231000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030231003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575185 + ... + 626815.

It is an arithmetic number, because the mean of its divisors is an integer number (1136452590).

Almost surely, 2^31030231000 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 31030231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36366482880).

31030231000 is an abundant number, since it is smaller than the sum of its proper divisors (41702734760).

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

31030231000 is a wasteful number, since it uses less digits than its factorization.

31030231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52253 (or 52239 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 31030231000 its reverse (13203013), we get a palindrome (31043434013).

The spelling of 31030231000 in words is "thirty-one billion, thirty million, two hundred thirty-one thousand".