31000332000 has 192 divisors, whose sum is σ = 110790021888. Its totient is φ = 7515200000.

The previous prime is 31000331981. The next prime is 31000332061. The reversal of 31000332000 is 23300013.

It is a happy number.

It is a super-2 number, since 2×31000332000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14575 + ... + 249425.

It is an arithmetic number, because the mean of its divisors is an integer number (577031364).

Almost surely, 2^31000332000 is an apocalyptic number.

31000332000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31000332000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55395010944).

31000332000 is an abundant number, since it is smaller than the sum of its proper divisors (79789689888).

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

31000332000 is a wasteful number, since it uses less digits than its factorization.

31000332000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234890 (or 234872 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 12.

Adding to 31000332000 its reverse (23300013), we get a palindrome (31023632013).

The spelling of 31000332000 in words is "thirty-one billion, three hundred thirty-two thousand".