215204041 has 16 divisors (see below), whose sum is σ = 241995600. Its totient is φ = 190003968.

The previous prime is 215204021. The next prime is 215204063. The reversal of 215204041 is 140402512.

It can be written as a sum of positive squares in 8 ways, for example, as 2890000 + 212314041 = 1700^2 + 14571^2 .

It is a cyclic number.

It is not a de Polignac number, because 215204041 - 2⁹ = 215203529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215204021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38475 + ... + 43711.

It is an arithmetic number, because the mean of its divisors is an integer number (15124725).

Almost surely, 2^215204041 is an apocalyptic number.

It is an amenable number.

215204041 is a deficient number, since it is larger than the sum of its proper divisors (26791559).

215204041 is a wasteful number, since it uses less digits than its factorization.

215204041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 215204041 is about 14669.8343889766. The cubic root of 215204041 is about 599.2620937887.

Adding to 215204041 its reverse (140402512), we get a palindrome (355606553).

The spelling of 215204041 in words is "two hundred fifteen million, two hundred four thousand, forty-one".