31243342424 has 128 divisors (see below), whose sum is σ = 71899228800. Its totient is φ = 12423782400.

The previous prime is 31243342423. The next prime is 31243342447. The reversal of 31243342424 is 42424334213.

It is a super-2 number, since 2×31243342424² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243342423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28171982 + ... + 28173090.

It is an arithmetic number, because the mean of its divisors is an integer number (561712725).

Almost surely, 2^31243342424 is an apocalyptic number.

31243342424 is a gapful number since it is divisible by the number (34) 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 31243342424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35949614400).

31243342424 is an abundant number, since it is smaller than the sum of its proper divisors (40655886376).

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

31243342424 is a wasteful number, since it uses less digits than its factorization.

31243342424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1529 counting only the distinct ones).

The product of its digits is 55296, while the sum is 32.

Adding to 31243342424 its reverse (42424334213), we get a palindrome (73667676637).

The spelling of 31243342424 in words is "thirty-one billion, two hundred forty-three million, three hundred forty-two thousand, four hundred twenty-four".