912213522 has 128 divisors (see below), whose sum is σ = 2349388800. Its totient is φ = 259459200.

The previous prime is 912213521. The next prime is 912213529. The reversal of 912213522 is 225312219.

It is a happy number.

912213522 is a `hidden beast` number, since 9 + 122 + 13 + 522 = 666.

912213522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (912213521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1478158 + ... + 1478774.

It is an arithmetic number, because the mean of its divisors is an integer number (18354600).

Almost surely, 2^912213522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 912213522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174694400).

912213522 is an abundant number, since it is smaller than the sum of its proper divisors (1437175278).

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

912213522 is a wasteful number, since it uses less digits than its factorization.

912213522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 783 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 912213522 is about 30202.8727441613. The cubic root of 912213522 is about 969.8371930675.

The spelling of 912213522 in words is "nine hundred twelve million, two hundred thirteen thousand, five hundred twenty-two".