215472656447 has 2 divisors, whose sum is σ = 215472656448. Its totient is φ = 215472656446.

The previous prime is 215472656417. The next prime is 215472656449. The reversal of 215472656447 is 744656274512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215472656447 - 2²⁴ = 215455879231 is a prime.

Together with 215472656449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215472656449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107736328223 + 107736328224.

It is an arithmetic number, because the mean of its divisors is an integer number (107736328224).

Almost surely, 2^215472656447 is an apocalyptic number.

215472656447 is a deficient number, since it is larger than the sum of its proper divisors (1).

215472656447 is an equidigital number, since it uses as much as digits as its factorization.

215472656447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11289600, while the sum is 53.

The spelling of 215472656447 in words is "two hundred fifteen billion, four hundred seventy-two million, six hundred fifty-six thousand, four hundred forty-seven".