31322424540 has 96 divisors (see below), whose sum is σ = 100711376640. Its totient is φ = 7193664000.

The previous prime is 31322424517. The next prime is 31322424541. The reversal of 31322424540 is 4542422313.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31322424498 and 31322424507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322424541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1236361 + ... + 1261440.

It is an arithmetic number, because the mean of its divisors is an integer number (1049076840).

Almost surely, 2^31322424540 is an apocalyptic number.

31322424540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31322424540 is an abundant number, since it is smaller than the sum of its proper divisors (69388952100).

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

31322424540 is a wasteful number, since it uses less digits than its factorization.

31322424540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497843 (or 2497841 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 31322424540 its reverse (4542422313), we get a palindrome (35864846853).

The spelling of 31322424540 in words is "thirty-one billion, three hundred twenty-two million, four hundred twenty-four thousand, five hundred forty".