31601331040 has 24 divisors (see below), whose sum is σ = 74658144960. Its totient is φ = 12640532352.

The previous prime is 31601330983. The next prime is 31601331053. The reversal of 31601331040 is 4013310613.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 98754000 + ... + 98754319.

It is an arithmetic number, because the mean of its divisors is an integer number (3110756040).

Almost surely, 2^31601331040 is an apocalyptic number.

It is an amenable number.

31601331040 is an abundant number, since it is smaller than the sum of its proper divisors (43056813920).

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

31601331040 is a wasteful number, since it uses less digits than its factorization.

31601331040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197508334 (or 197508326 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31601331040 its reverse (4013310613), we get a palindrome (35614641653).

The spelling of 31601331040 in words is "thirty-one billion, six hundred one million, three hundred thirty-one thousand, forty".