43212453215 has 4 divisors (see below), whose sum is σ = 51854943864. Its totient is φ = 34569962568.

The previous prime is 43212453211. The next prime is 43212453227. The reversal of 43212453215 is 51235421234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51235421234 = 2 ⋅25617710617.

It is a cyclic number.

It is not a de Polignac number, because 43212453215 - 2² = 43212453211 is a prime.

It is a super-2 number, since 2×43212453215² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43212453211) 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, 4321245317 + ... + 4321245326.

It is an arithmetic number, because the mean of its divisors is an integer number (12963735966).

Almost surely, 2^43212453215 is an apocalyptic number.

43212453215 is a deficient number, since it is larger than the sum of its proper divisors (8642490649).

43212453215 is an equidigital number, since it uses as much as digits as its factorization.

43212453215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642490648.

The product of its digits is 28800, while the sum is 32.

Adding to 43212453215 its reverse (51235421234), we get a palindrome (94447874449).

The spelling of 43212453215 in words is "forty-three billion, two hundred twelve million, four hundred fifty-three thousand, two hundred fifteen".