215446121 has 8 divisors (see below), whose sum is σ = 235249824. Its totient is φ = 195678720.

The previous prime is 215446097. The next prime is 215446159. The reversal of 215446121 is 121644512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215446121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215446421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4190 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (29406228).

Almost surely, 2^215446121 is an apocalyptic number.

It is an amenable number.

215446121 is a deficient number, since it is larger than the sum of its proper divisors (19803703).

215446121 is a wasteful number, since it uses less digits than its factorization.

215446121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18151.

The product of its digits is 1920, while the sum is 26.

The square root of 215446121 is about 14678.0830151624. The cubic root of 215446121 is about 599.4867100884.

The spelling of 215446121 in words is "two hundred fifteen million, four hundred forty-six thousand, one hundred twenty-one".