217425641529623 has 2 divisors, whose sum is σ = 217425641529624. Its totient is φ = 217425641529622.

The previous prime is 217425641529587. The next prime is 217425641529653. The reversal of 217425641529623 is 326925146524712.

217425641529623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217425641529623 - 2⁶ = 217425641529559 is a prime.

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 (217425641529653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108712820764811 + 108712820764812.

It is an arithmetic number, because the mean of its divisors is an integer number (108712820764812).

Almost surely, 2^{217425641529623} is an apocalyptic number.

217425641529623 is a deficient number, since it is larger than the sum of its proper divisors (1).

217425641529623 is an equidigital number, since it uses as much as digits as its factorization.

217425641529623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43545600, while the sum is 59.

The spelling of 217425641529623 in words is "two hundred seventeen trillion, four hundred twenty-five billion, six hundred forty-one million, five hundred twenty-nine thousand, six hundred twenty-three".