215421343198 has 16 divisors (see below), whose sum is σ = 330051898944. Its totient is φ = 105404664960.

The previous prime is 215421343183. The next prime is 215421343201. The reversal of 215421343198 is 891343124512.

215421343198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 in 7 ways as a sum of consecutive naturals, for example, 559186 + ... + 862282.

It is an arithmetic number, because the mean of its divisors is an integer number (20628243684).

Almost surely, 2^215421343198 is an apocalyptic number.

215421343198 is a deficient number, since it is larger than the sum of its proper divisors (114630555746).

215421343198 is a wasteful number, since it uses less digits than its factorization.

215421343198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310707.

The product of its digits is 207360, while the sum is 43.

The spelling of 215421343198 in words is "two hundred fifteen billion, four hundred twenty-one million, three hundred forty-three thousand, one hundred ninety-eight".