43451220041 has 4 divisors (see below), whose sum is σ = 43483007232. Its totient is φ = 43419432852.

The previous prime is 43451220019. The next prime is 43451220047. The reversal of 43451220041 is 14002215434.

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 43451220041 - 2³⁴ = 26271350857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43451220047) 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, 15891545 + ... + 15894278.

It is an arithmetic number, because the mean of its divisors is an integer number (10870751808).

Almost surely, 2^43451220041 is an apocalyptic number.

It is an amenable number.

43451220041 is a deficient number, since it is larger than the sum of its proper divisors (31787191).

43451220041 is a wasteful number, since it uses less digits than its factorization.

43451220041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31787190.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 43451220041 its reverse (14002215434), we get a palindrome (57453435475).

The spelling of 43451220041 in words is "forty-three billion, four hundred fifty-one million, two hundred twenty thousand, forty-one".