9921051522 has 54 divisors (see below), whose sum is σ = 22850985339. Its totient is φ = 3110232960.

The previous prime is 9921051509. The next prime is 9921051523. The reversal of 9921051522 is 2251501299.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 7337464281 + 2583587241 = 85659^2 + 50829^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=70431.

It is not an unprimeable number, because it can be changed into a prime (9921051523) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7183272 + ... + 7184652.

Almost surely, 2^9921051522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9921051522

9921051522 is an abundant number, since it is smaller than the sum of its proper divisors (12929933817).

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

9921051522 is a wasteful number, since it uses less digits than its factorization.

9921051522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 9921051522 is about 99604.4754114995. The cubic root of 9921051522 is about 2148.7500592597.

Multiplying 9921051522 by its product of nonzero digits (16200), we get a square (160721034656400 = 12677580²).

The spelling of 9921051522 in words is "nine billion, nine hundred twenty-one million, fifty-one thousand, five hundred twenty-two".