31243034000 has 160 divisors (see below), whose sum is σ = 78445916640. Its totient is φ = 12020736000.

The previous prime is 31243033999. The next prime is 31243034021. The reversal of 31243034000 is 43034213.

It can be written as a sum of positive squares in 16 ways, for example, as 27440585104 + 3802448896 = 165652^2 + 61664^2 .

It is a super-2 number, since 2×31243034000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 18153140 + ... + 18154860.

It is an arithmetic number, because the mean of its divisors is an integer number (490286979).

Almost surely, 2^31243034000 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 31243034000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39222958320).

31243034000 is an abundant number, since it is smaller than the sum of its proper divisors (47202882640).

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

31243034000 is a wasteful number, since it uses less digits than its factorization.

31243034000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31243034000 its reverse (43034213), we get a palindrome (31286068213).

The spelling of 31243034000 in words is "thirty-one billion, two hundred forty-three million, thirty-four thousand".