31324311040 has 80 divisors (see below), whose sum is σ = 81932724720. Its totient is φ = 11390648320.

The previous prime is 31324311017. The next prime is 31324311043. The reversal of 31324311040 is 4011342313.

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

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31324311043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528025 + ... + 584344.

It is an arithmetic number, because the mean of its divisors is an integer number (1024159059).

Almost surely, 2^31324311040 is an apocalyptic number.

It is an amenable number.

31324311040 is an abundant number, since it is smaller than the sum of its proper divisors (50608413680).

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

31324311040 is a wasteful number, since it uses less digits than its factorization.

31324311040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112403 (or 1112387 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31324311040 its reverse (4011342313), we get a palindrome (35335653353).

The spelling of 31324311040 in words is "thirty-one billion, three hundred twenty-four million, three hundred eleven thousand, forty".