43215445513 has 4 divisors (see below), whose sum is σ = 43282655248. Its totient is φ = 43148235780.

The previous prime is 43215445487. The next prime is 43215445519. The reversal of 43215445513 is 31554451234.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31554451234 = 2 ⋅15777225617.

It is a cyclic number.

It is not a de Polignac number, because 43215445513 - 2⁹ = 43215445001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43215445519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33603903 + ... + 33605188.

It is an arithmetic number, because the mean of its divisors is an integer number (10820663812).

Almost surely, 2^43215445513 is an apocalyptic number.

It is an amenable number.

43215445513 is a deficient number, since it is larger than the sum of its proper divisors (67209735).

43215445513 is an equidigital number, since it uses as much as digits as its factorization.

43215445513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67209734.

The product of its digits is 144000, while the sum is 37.

Adding to 43215445513 its reverse (31554451234), we get a palindrome (74769896747).

The spelling of 43215445513 in words is "forty-three billion, two hundred fifteen million, four hundred forty-five thousand, five hundred thirteen".