31313131140 has 48 divisors (see below), whose sum is σ = 87819899328. Its totient is φ = 8336536704.

The previous prime is 31313131139. The next prime is 31313131141. The reversal of 31313131140 is 4113131313.

It is an interprime number because it is at equal distance from previous prime (31313131139) and next prime (31313131141).

It is not an unprimeable number, because it can be changed into a prime (31313131141) 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, 388902 + ... + 462461.

It is an arithmetic number, because the mean of its divisors is an integer number (1829581236).

Almost surely, 2^31313131140 is an apocalyptic number.

31313131140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31313131140 is an abundant number, since it is smaller than the sum of its proper divisors (56506768188).

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

31313131140 is a wasteful number, since it uses less digits than its factorization.

31313131140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851988 (or 851986 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31313131140 its reverse (4113131313), we get a palindrome (35426262453).

The spelling of 31313131140 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty-one thousand, one hundred forty".