209535422247 has 6 divisors (see below), whose sum is σ = 302662276592. Its totient is φ = 139690281492.

The previous prime is 209535422189. The next prime is 209535422251. The reversal of 209535422247 is 742224535902.

It is not a de Polignac number, because 209535422247 - 2⁷ = 209535422119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209535422267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11640856783 + ... + 11640856800.

Almost surely, 2^209535422247 is an apocalyptic number.

209535422247 is a deficient number, since it is larger than the sum of its proper divisors (93126854345).

209535422247 is a wasteful number, since it uses less digits than its factorization.

209535422247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23281713589 (or 23281713586 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 209535422247 in words is "two hundred nine billion, five hundred thirty-five million, four hundred twenty-two thousand, two hundred forty-seven".