215420041 has 2 divisors, whose sum is σ = 215420042. Its totient is φ = 215420040.

The previous prime is 215420011. The next prime is 215420053. The reversal of 215420041 is 140024512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205205625 + 10214416 = 14325^2 + 3196^2 .

It is a cyclic number.

It is not a de Polignac number, because 215420041 - 2⁷ = 215419913 is a prime.

It is not a weakly prime, because it can be changed into another prime (215420011) 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 as a sum of consecutive naturals, namely, 107710020 + 107710021.

It is an arithmetic number, because the mean of its divisors is an integer number (107710021).

Almost surely, 2^215420041 is an apocalyptic number.

It is an amenable number.

215420041 is a deficient number, since it is larger than the sum of its proper divisors (1).

215420041 is an equidigital number, since it uses as much as digits as its factorization.

215420041 is an odious number, because the sum of its binary digits is odd.

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

The square root of 215420041 is about 14677.1945888852. The cubic root of 215420041 is about 599.4625195944.

Adding to 215420041 its reverse (140024512), we get a palindrome (355444553).

The spelling of 215420041 in words is "two hundred fifteen million, four hundred twenty thousand, forty-one".