43997051522 has 18 divisors (see below), whose sum is σ = 66970242729. Its totient is φ = 21678305040.

The previous prime is 43997051519. The next prime is 43997051543. The reversal of 43997051522 is 22515079934.

It can be written as a sum of positive squares in 2 ways, for example, as 36233503201 + 7763548321 = 190351^2 + 88111^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=148319.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 21060254 + ... + 21062342.

Almost surely, 2^43997051522 is an apocalyptic number.

43997051522 is a deficient number, since it is larger than the sum of its proper divisors (22973191207).

43997051522 is an frugal number, since it uses more digits than its factorization.

43997051522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 43997051522 in words is "forty-three billion, nine hundred ninety-seven million, fifty-one thousand, five hundred twenty-two".