31242043140 has 192 divisors, whose sum is σ = 114803619840. Its totient is φ = 6150159360.

The previous prime is 31242043139. The next prime is 31242043163. The reversal of 31242043140 is 4134024213.

It is a self number, because there is not a number n which added to its sum of digits gives 31242043140.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90177 + ... + 265736.

It is an arithmetic number, because the mean of its divisors is an integer number (597935520).

Almost surely, 2^31242043140 is an apocalyptic number.

31242043140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31242043140 is an abundant number, since it is smaller than the sum of its proper divisors (83561576700).

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

31242043140 is a wasteful number, since it uses less digits than its factorization.

31242043140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355962 (or 355960 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31242043140 its reverse (4134024213), we get a palindrome (35376067353).

The spelling of 31242043140 in words is "thirty-one billion, two hundred forty-two million, forty-three thousand, one hundred forty".