31430231340 has 96 divisors (see below), whose sum is σ = 88567395840. Its totient is φ = 8327970816.

The previous prime is 31430231333. The next prime is 31430231341. The reversal of 31430231340 is 4313203413.

It is a self number, because there is not a number n which added to its sum of digits gives 31430231340.

It is not an unprimeable number, because it can be changed into a prime (31430231341) 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, 6767059 + ... + 6771701.

It is an arithmetic number, because the mean of its divisors is an integer number (922577040).

Almost surely, 2^31430231340 is an apocalyptic number.

31430231340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31430231340 is an abundant number, since it is smaller than the sum of its proper divisors (57137164500).

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

31430231340 is a wasteful number, since it uses less digits than its factorization.

31430231340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5351 (or 5349 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31430231340 its reverse (4313203413), we get a palindrome (35743434753).

The spelling of 31430231340 in words is "thirty-one billion, four hundred thirty million, two hundred thirty-one thousand, three hundred forty".