215147441 has 2 divisors, whose sum is σ = 215147442. Its totient is φ = 215147440.

The previous prime is 215147423. The next prime is 215147467. The reversal of 215147441 is 144741512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176757025 + 38390416 = 13295^2 + 6196^2 .

It is a cyclic number.

It is not a de Polignac number, because 215147441 - 2¹⁴ = 215131057 is a prime.

It is not a weakly prime, because it can be changed into another prime (215147041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107573720 + 107573721.

It is an arithmetic number, because the mean of its divisors is an integer number (107573721).

Almost surely, 2^215147441 is an apocalyptic number.

It is an amenable number.

215147441 is a deficient number, since it is larger than the sum of its proper divisors (1).

215147441 is an equidigital number, since it uses as much as digits as its factorization.

215147441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480, while the sum is 29.

The square root of 215147441 is about 14667.9051333174. The cubic root of 215147441 is about 599.2095526307.

Adding to 215147441 its reverse (144741512), we get a palindrome (359888953).

The spelling of 215147441 in words is "two hundred fifteen million, one hundred forty-seven thousand, four hundred forty-one".