215423556206 has 4 divisors (see below), whose sum is σ = 323135334312. Its totient is φ = 107711778102.

The previous prime is 215423556199. The next prime is 215423556247. The reversal of 215423556206 is 602655324512.

215423556206 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×215423556206² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 53855889050 + ... + 53855889053.

It is an arithmetic number, because the mean of its divisors is an integer number (80783833578).

Almost surely, 2^215423556206 is an apocalyptic number.

215423556206 is a deficient number, since it is larger than the sum of its proper divisors (107711778106).

215423556206 is a wasteful number, since it uses less digits than its factorization.

215423556206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107711778105.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 215423556206 in words is "two hundred fifteen billion, four hundred twenty-three million, five hundred fifty-six thousand, two hundred six".