43505440001 has 4 divisors (see below), whose sum is σ = 44242820400. Its totient is φ = 42768059604.

The previous prime is 43505439983. The next prime is 43505440037. The reversal of 43505440001 is 10004450534.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43505440001 is a prime.

It is a super-2 number, since 2×43505440001² (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 (43505440501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368690111 + ... + 368690228.

It is an arithmetic number, because the mean of its divisors is an integer number (11060705100).

Almost surely, 2^43505440001 is an apocalyptic number.

It is an amenable number.

43505440001 is a deficient number, since it is larger than the sum of its proper divisors (737380399).

43505440001 is an equidigital number, since it uses as much as digits as its factorization.

43505440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737380398.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 43505440001 its reverse (10004450534), we get a palindrome (53509890535).

The spelling of 43505440001 in words is "forty-three billion, five hundred five million, four hundred forty thousand, one".