43215220105 has 4 divisors (see below), whose sum is σ = 51858264132. Its totient is φ = 34572176080.

The previous prime is 43215220093. The next prime is 43215220121. The reversal of 43215220105 is 50102251234.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31372557129 + 11842662976 = 177123^2 + 108824^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43215220105 is a prime.

It is a super-3 number, since 3×43215220105³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43215220105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4321522006 + ... + 4321522015.

It is an arithmetic number, because the mean of its divisors is an integer number (12964566033).

Almost surely, 2^43215220105 is an apocalyptic number.

It is an amenable number.

43215220105 is a deficient number, since it is larger than the sum of its proper divisors (8643044027).

43215220105 is an equidigital number, since it uses as much as digits as its factorization.

43215220105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8643044026.

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

Adding to 43215220105 its reverse (50102251234), we get a palindrome (93317471339).

The spelling of 43215220105 in words is "forty-three billion, two hundred fifteen million, two hundred twenty thousand, one hundred five".