31320234340 has 48 divisors (see below), whose sum is σ = 69729214464. Its totient is φ = 11796278400.

The previous prime is 31320234329. The next prime is 31320234347. The reversal of 31320234340 is 4343202313.

It is a super-2 number, since 2×31320234340² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31320234347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659716 + ... + 705595.

It is an arithmetic number, because the mean of its divisors is an integer number (1452691968).

Almost surely, 2^31320234340 is an apocalyptic number.

It is an amenable number.

31320234340 is an abundant number, since it is smaller than the sum of its proper divisors (38408980124).

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

31320234340 is a wasteful number, since it uses less digits than its factorization.

31320234340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365388 (or 1365386 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 31320234340 its reverse (4343202313), we get a palindrome (35663436653).

The spelling of 31320234340 in words is "thirty-one billion, three hundred twenty million, two hundred thirty-four thousand, three hundred forty".