215463708155 has 4 divisors (see below), whose sum is σ = 258556449792. Its totient is φ = 172370966520.

The previous prime is 215463708151. The next prime is 215463708167. The reversal of 215463708155 is 551807364512.

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

It is not a de Polignac number, because 215463708155 - 2² = 215463708151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215463708151) 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, 21546370811 + ... + 21546370820.

It is an arithmetic number, because the mean of its divisors is an integer number (64639112448).

Almost surely, 2^215463708155 is an apocalyptic number.

215463708155 is a deficient number, since it is larger than the sum of its proper divisors (43092741637).

215463708155 is an equidigital number, since it uses as much as digits as its factorization.

215463708155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43092741636.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 215463708155 in words is "two hundred fifteen billion, four hundred sixty-three million, seven hundred eight thousand, one hundred fifty-five".