215450020559 has 2 divisors, whose sum is σ = 215450020560. Its totient is φ = 215450020558.

The previous prime is 215450020543. The next prime is 215450020571. The reversal of 215450020559 is 955020054512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215450020559 - 2⁴ = 215450020543 is a prime.

It is a super-2 number, since 2×215450020559² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215450020759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107725010279 + 107725010280.

It is an arithmetic number, because the mean of its divisors is an integer number (107725010280).

Almost surely, 2^215450020559 is an apocalyptic number.

215450020559 is a deficient number, since it is larger than the sum of its proper divisors (1).

215450020559 is an equidigital number, since it uses as much as digits as its factorization.

215450020559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 215450020559 in words is "two hundred fifteen billion, four hundred fifty million, twenty thousand, five hundred fifty-nine".