43215443253 has 24 divisors (see below), whose sum is σ = 63399510720. Its totient is φ = 28361753280.

The previous prime is 43215443239. The next prime is 43215443273. The reversal of 43215443253 is 35234451234.

43215443253 is a `hidden beast` number, since 4 + 3 + 215 + 4 + 432 + 5 + 3 = 666.

It is not a de Polignac number, because 43215443253 - 2⁵ = 43215443221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43215443273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106968 + ... + 312846.

It is an arithmetic number, because the mean of its divisors is an integer number (2641646280).

Almost surely, 2^43215443253 is an apocalyptic number.

It is an amenable number.

43215443253 is a deficient number, since it is larger than the sum of its proper divisors (20184067467).

43215443253 is a wasteful number, since it uses less digits than its factorization.

43215443253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206249 (or 206246 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

Adding to 43215443253 its reverse (35234451234), we get a palindrome (78449894487).

The spelling of 43215443253 in words is "forty-three billion, two hundred fifteen million, four hundred forty-three thousand, two hundred fifty-three".