31542040240 has 80 divisors (see below), whose sum is σ = 76996723680. Its totient is φ = 11999877120.

The previous prime is 31542040199. The next prime is 31542040289. The reversal of 31542040240 is 4204024513.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53980 + ... + 256900.

It is an arithmetic number, because the mean of its divisors is an integer number (962459046).

Almost surely, 2^31542040240 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 31542040240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38498361840).

31542040240 is an abundant number, since it is smaller than the sum of its proper divisors (45454683440).

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

31542040240 is a wasteful number, since it uses less digits than its factorization.

31542040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203030 (or 203024 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 31542040240 its reverse (4204024513), we get a palindrome (35746064753).

The spelling of 31542040240 in words is "thirty-one billion, five hundred forty-two million, forty thousand, two hundred forty".