31424243240 has 128 divisors (see below), whose sum is σ = 78081615360. Its totient is φ = 11309481984.

The previous prime is 31424243231. The next prime is 31424243251. The reversal of 31424243240 is 4234242413.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6278579 + ... + 6283581.

It is an arithmetic number, because the mean of its divisors is an integer number (610012620).

Almost surely, 2^31424243240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31424243240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39040807680).

31424243240 is an abundant number, since it is smaller than the sum of its proper divisors (46657372120).

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

31424243240 is a wasteful number, since it uses less digits than its factorization.

31424243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331 (or 5327 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 31424243240 its reverse (4234242413), we get a palindrome (35658485653).

The spelling of 31424243240 in words is "thirty-one billion, four hundred twenty-four million, two hundred forty-three thousand, two hundred forty".