215541472427 has 2 divisors, whose sum is σ = 215541472428. Its totient is φ = 215541472426.

The previous prime is 215541472339. The next prime is 215541472439. The reversal of 215541472427 is 724274145512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215541472427 - 2³² = 211246505131 is a prime.

It is not a weakly prime, because it can be changed into another prime (215541472457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107770736213 + 107770736214.

It is an arithmetic number, because the mean of its divisors is an integer number (107770736214).

Almost surely, 2^215541472427 is an apocalyptic number.

215541472427 is a deficient number, since it is larger than the sum of its proper divisors (1).

215541472427 is an equidigital number, since it uses as much as digits as its factorization.

215541472427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627200, while the sum is 44.

The spelling of 215541472427 in words is "two hundred fifteen billion, five hundred forty-one million, four hundred seventy-two thousand, four hundred twenty-seven".