43097420561 has 16 divisors (see below), whose sum is σ = 47120984064. Its totient is φ = 39175449984.

The previous prime is 43097420557. The next prime is 43097420593. The reversal of 43097420561 is 16502479034.

It is a cyclic number.

It is not a de Polignac number, because 43097420561 - 2² = 43097420557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43097420161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3449021 + ... + 3461493.

It is an arithmetic number, because the mean of its divisors is an integer number (2945061504).

Almost surely, 2^43097420561 is an apocalyptic number.

It is an amenable number.

43097420561 is a deficient number, since it is larger than the sum of its proper divisors (4023563503).

43097420561 is a wasteful number, since it uses less digits than its factorization.

43097420561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520.

The product of its (nonzero) digits is 181440, while the sum is 41.

Adding to 43097420561 its reverse (16502479034), we get a palindrome (59599899595).

The spelling of 43097420561 in words is "forty-three billion, ninety-seven million, four hundred twenty thousand, five hundred sixty-one".