215063166421 has 16 divisors (see below), whose sum is σ = 220162715136. Its totient is φ = 210030779376.

The previous prime is 215063166391. The next prime is 215063166431. The reversal of 215063166421 is 124661360512.

It is a cyclic number.

It is not a de Polignac number, because 215063166421 - 2¹⁷ = 215063035349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215063166431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4790746 + ... + 4835428.

It is an arithmetic number, because the mean of its divisors is an integer number (13760169696).

Almost surely, 2^215063166421 is an apocalyptic number.

It is an amenable number.

215063166421 is a deficient number, since it is larger than the sum of its proper divisors (5099548715).

215063166421 is a wasteful number, since it uses less digits than its factorization.

215063166421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45432.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 215063166421 in words is "two hundred fifteen billion, sixty-three million, one hundred sixty-six thousand, four hundred twenty-one".