812522211452 has 36 divisors (see below), whose sum is σ = 1657312909560. Its totient is φ = 347539629024.

The previous prime is 812522211401. The next prime is 812522211491. The reversal of 812522211452 is 254112225218.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3972458 + ... + 4171985.

It is an arithmetic number, because the mean of its divisors is an integer number (46036469710).

Almost surely, 2^812522211452 is an apocalyptic number.

It is an amenable number.

812522211452 is an abundant number, since it is smaller than the sum of its proper divisors (844790698108).

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

812522211452 is a wasteful number, since it uses less digits than its factorization.

812522211452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144970 (or 8144961 counting only the distinct ones).

The product of its digits is 25600, while the sum is 35.

The spelling of 812522211452 in words is "eight hundred twelve billion, five hundred twenty-two million, two hundred eleven thousand, four hundred fifty-two".