43403318561 has 16 divisors (see below), whose sum is σ = 46269577728. Its totient is φ = 40619251200.

The previous prime is 43403318551. The next prime is 43403318617. The reversal of 43403318561 is 16581330434.

It is not a de Polignac number, because 43403318561 - 2³⁴ = 26223449377 is a prime.

It is a super-2 number, since 2×43403318561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43403318551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4796201 + ... + 4805241.

It is an arithmetic number, because the mean of its divisors is an integer number (2891848608).

Almost surely, 2^43403318561 is an apocalyptic number.

It is an amenable number.

43403318561 is a deficient number, since it is larger than the sum of its proper divisors (2866259167).

43403318561 is a wasteful number, since it uses less digits than its factorization.

43403318561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13552.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 43403318561 its reverse (16581330434), we get a palindrome (59984648995).

The spelling of 43403318561 in words is "forty-three billion, four hundred three million, three hundred eighteen thousand, five hundred sixty-one".