31132203140 has 24 divisors (see below), whose sum is σ = 66485724480. Its totient is φ = 12241815008.

The previous prime is 31132203131. The next prime is 31132203149. The reversal of 31132203140 is 4130223113.

It is an interprime number because it is at equal distance from previous prime (31132203131) and next prime (31132203149).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31132203149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13190432 + ... + 13192791.

It is an arithmetic number, because the mean of its divisors is an integer number (2770238520).

Almost surely, 2^31132203140 is an apocalyptic number.

It is an amenable number.

31132203140 is an abundant number, since it is smaller than the sum of its proper divisors (35353521340).

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

31132203140 is a wasteful number, since it uses less digits than its factorization.

31132203140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26383291 (or 26383289 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31132203140 its reverse (4130223113), we get a palindrome (35262426253).

The spelling of 31132203140 in words is "thirty-one billion, one hundred thirty-two million, two hundred three thousand, one hundred forty".