31540253000 has 128 divisors (see below), whose sum is σ = 78558685920. Its totient is φ = 11811225600.

The previous prime is 31540252969. The next prime is 31540253009. The reversal of 31540253000 is 35204513.

It can be written as a sum of positive squares in 16 ways, for example, as 816473476 + 30723779524 = 28574^2 + 175282^2 .

It is not an unprimeable number, because it can be changed into a prime (31540253009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3276194 + ... + 3285806.

Almost surely, 2^31540253000 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 31540253000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39279342960).

31540253000 is an abundant number, since it is smaller than the sum of its proper divisors (47018432920).

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

31540253000 is a wasteful number, since it uses less digits than its factorization.

31540253000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9844 (or 9830 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 31540253000 its reverse (35204513), we get a palindrome (31575457513).

The spelling of 31540253000 in words is "thirty-one billion, five hundred forty million, two hundred fifty-three thousand".