31321124340 has 48 divisors (see below), whose sum is σ = 95671800000. Its totient is φ = 7592999680.

The previous prime is 31321124293. The next prime is 31321124399. The reversal of 31321124340 is 4342112313.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31321124340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23727465 + ... + 23728784.

It is an arithmetic number, because the mean of its divisors is an integer number (1993162500).

Almost surely, 2^31321124340 is an apocalyptic number.

31321124340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31321124340 is an abundant number, since it is smaller than the sum of its proper divisors (64350675660).

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

31321124340 is a wasteful number, since it uses less digits than its factorization.

31321124340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47456272 (or 47456270 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31321124340 its reverse (4342112313), we get a palindrome (35663236653).

The spelling of 31321124340 in words is "thirty-one billion, three hundred twenty-one million, one hundred twenty-four thousand, three hundred forty".