43215220051 has 4 divisors (see below), whose sum is σ = 43215928704. Its totient is φ = 43214511400.

The previous prime is 43215220019. The next prime is 43215220079. The reversal of 43215220051 is 15002251234.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43215220051 - 2⁵ = 43215220019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43215219998 and 43215220025.

It is not an unprimeable number, because it can be changed into a prime (43215250051) 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, 253240 + ... + 388021.

It is an arithmetic number, because the mean of its divisors is an integer number (10803982176).

Almost surely, 2^43215220051 is an apocalyptic number.

43215220051 is a deficient number, since it is larger than the sum of its proper divisors (708653).

43215220051 is an equidigital number, since it uses as much as digits as its factorization.

43215220051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708652.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 43215220051 its reverse (15002251234), we get a palindrome (58217471285).

The spelling of 43215220051 in words is "forty-three billion, two hundred fifteen million, two hundred twenty thousand, fifty-one".