215315346166 has 16 divisors (see below), whose sum is σ = 349247422656. Its totient is φ = 99169019776.

The previous prime is 215315346143. The next prime is 215315346203. The reversal of 215315346166 is 661643513512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67368661 + ... + 67371856.

It is an arithmetic number, because the mean of its divisors is an integer number (21827963916).

Almost surely, 2^215315346166 is an apocalyptic number.

215315346166 is a deficient number, since it is larger than the sum of its proper divisors (133932076490).

215315346166 is a wasteful number, since it uses less digits than its factorization.

215315346166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134740583.

The product of its digits is 388800, while the sum is 43.

Adding to 215315346166 its reverse (661643513512), we get a palindrome (876958859678).

The spelling of 215315346166 in words is "two hundred fifteen billion, three hundred fifteen million, three hundred forty-six thousand, one hundred sixty-six".