30751471212 has 192 divisors, whose sum is σ = 90672196608. Its totient is φ = 7879680000.

The previous prime is 30751471181. The next prime is 30751471213. The reversal of 30751471212 is 21217415703.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (30751471213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40408912 + ... + 40409672.

It is an arithmetic number, because the mean of its divisors is an integer number (472251024).

Almost surely, 2^30751471212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30751471212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45336098304).

30751471212 is an abundant number, since it is smaller than the sum of its proper divisors (59920725396).

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

30751471212 is a wasteful number, since it uses less digits than its factorization.

30751471212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1318 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

Adding to 30751471212 its reverse (21217415703), we get a palindrome (51968886915).

The spelling of 30751471212 in words is "thirty billion, seven hundred fifty-one million, four hundred seventy-one thousand, two hundred twelve".