43124422661 has 4 divisors (see below), whose sum is σ = 43129813824. Its totient is φ = 43119031500.

The previous prime is 43124422657. The next prime is 43124422727. The reversal of 43124422661 is 16622442134.

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 not a de Polignac number, because 43124422661 - 2² = 43124422657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43124472661) 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, 2683565 + ... + 2699586.

It is an arithmetic number, because the mean of its divisors is an integer number (10782453456).

Almost surely, 2^43124422661 is an apocalyptic number.

It is an amenable number.

43124422661 is a deficient number, since it is larger than the sum of its proper divisors (5391163).

43124422661 is an equidigital number, since it uses as much as digits as its factorization.

43124422661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391162.

The product of its digits is 55296, while the sum is 35.

Adding to 43124422661 its reverse (16622442134), we get a palindrome (59746864795).

The spelling of 43124422661 in words is "forty-three billion, one hundred twenty-four million, four hundred twenty-two thousand, six hundred sixty-one".