30531400212 has 12 divisors (see below), whose sum is σ = 71239933856. Its totient is φ = 10177133400.

The previous prime is 30531400171. The next prime is 30531400217. The reversal of 30531400212 is 21200413503.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30531400217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272141664 + ... + 1272141687.

Almost surely, 2^30531400212 is an apocalyptic number.

It is an amenable number.

30531400212 is an abundant number, since it is smaller than the sum of its proper divisors (40708533644).

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

30531400212 is a wasteful number, since it uses less digits than its factorization.

30531400212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544283358 (or 2544283356 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 30531400212 its reverse (21200413503), we get a palindrome (51731813715).

The spelling of 30531400212 in words is "thirty billion, five hundred thirty-one million, four hundred thousand, two hundred twelve".