215195441 has 4 divisors (see below), whose sum is σ = 221011572. Its totient is φ = 209379312.

The previous prime is 215195437. The next prime is 215195443. The reversal of 215195441 is 144591512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187580416 + 27615025 = 13696^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 215195441 - 2² = 215195437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215195398 and 215195407.

It is not an unprimeable number, because it can be changed into a prime (215195443) 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, 2908010 + ... + 2908083.

It is an arithmetic number, because the mean of its divisors is an integer number (55252893).

Almost surely, 2^215195441 is an apocalyptic number.

It is an amenable number.

215195441 is a deficient number, since it is larger than the sum of its proper divisors (5816131).

215195441 is an equidigital number, since it uses as much as digits as its factorization.

215195441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5816130.

The product of its digits is 7200, while the sum is 32.

The square root of 215195441 is about 14669.5412675380. The cubic root of 215195441 is about 599.2541110968.

The spelling of 215195441 in words is "two hundred fifteen million, one hundred ninety-five thousand, four hundred forty-one".