31200212132 has 48 divisors (see below), whose sum is σ = 61031154240. Its totient is φ = 13869407232.

The previous prime is 31200212123. The next prime is 31200212137. The reversal of 31200212132 is 23121200213.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 31200212132.

It is not an unprimeable number, because it can be changed into a prime (31200212137) 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, 413528 + ... + 483120.

It is an arithmetic number, because the mean of its divisors is an integer number (1271482380).

Almost surely, 2^31200212132 is an apocalyptic number.

It is an amenable number.

31200212132 is a deficient number, since it is larger than the sum of its proper divisors (29830942108).

31200212132 is a wasteful number, since it uses less digits than its factorization.

31200212132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69980 (or 69978 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31200212132 its reverse (23121200213), we get a palindrome (54321412345).

The spelling of 31200212132 in words is "thirty-one billion, two hundred million, two hundred twelve thousand, one hundred thirty-two".