215966141 has 4 divisors (see below), whose sum is σ = 227332800. Its totient is φ = 204599484.

The previous prime is 215966063. The next prime is 215966209. The reversal of 215966141 is 141669512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215966141 - 2¹⁸ = 215703997 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 (215966441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5683301 + ... + 5683338.

It is an arithmetic number, because the mean of its divisors is an integer number (56833200).

Almost surely, 2^215966141 is an apocalyptic number.

It is an amenable number.

215966141 is a deficient number, since it is larger than the sum of its proper divisors (11366659).

215966141 is a wasteful number, since it uses less digits than its factorization.

215966141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11366658.

The product of its digits is 12960, while the sum is 35.

The square root of 215966141 is about 14695.7865049816. The cubic root of 215966141 is about 599.9686474358.

The spelling of 215966141 in words is "two hundred fifteen million, nine hundred sixty-six thousand, one hundred forty-one".