31562321340 has 192 divisors, whose sum is σ = 97796160000. Its totient is φ = 7542174720.

The previous prime is 31562321249. The next prime is 31562321347. The reversal of 31562321340 is 4312326513.

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 = 31562321298 and 31562321307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31562321347) 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 63 ways as a sum of consecutive naturals, for example, 13668106 + ... + 13670414.

It is an arithmetic number, because the mean of its divisors is an integer number (509355000).

Almost surely, 2^31562321340 is an apocalyptic number.

31562321340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31562321340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48898080000).

31562321340 is an abundant number, since it is smaller than the sum of its proper divisors (66233838660).

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

31562321340 is a wasteful number, since it uses less digits than its factorization.

31562321340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 31562321340 its reverse (4312326513), we get a palindrome (35874647853).

The spelling of 31562321340 in words is "thirty-one billion, five hundred sixty-two million, three hundred twenty-one thousand, three hundred forty".