215125441 has 2 divisors, whose sum is σ = 215125442. Its totient is φ = 215125440.

The previous prime is 215125423. The next prime is 215125447. The reversal of 215125441 is 144521512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149450625 + 65674816 = 12225^2 + 8104^2 .

It is a cyclic number.

It is not a de Polignac number, because 215125441 - 2¹³ = 215117249 is a prime.

It is not a weakly prime, because it can be changed into another prime (215125447) 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, 107562720 + 107562721.

It is an arithmetic number, because the mean of its divisors is an integer number (107562721).

Almost surely, 2^215125441 is an apocalyptic number.

It is an amenable number.

215125441 is a deficient number, since it is larger than the sum of its proper divisors (1).

215125441 is an equidigital number, since it uses as much as digits as its factorization.

215125441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 25.

The square root of 215125441 is about 14667.1551774705. The cubic root of 215125441 is about 599.1891277856.

Adding to 215125441 its reverse (144521512), we get a palindrome (359646953).

The spelling of 215125441 in words is "two hundred fifteen million, one hundred twenty-five thousand, four hundred forty-one".