217506213448 has 32 divisors (see below), whose sum is σ = 431856804960. Its totient is φ = 102345672960.

The previous prime is 217506213439. The next prime is 217506213467. The reversal of 217506213448 is 844312605712.

217506213448 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390615 + ... + 1539097.

It is an arithmetic number, because the mean of its divisors is an integer number (13495525155).

Almost surely, 2^217506213448 is an apocalyptic number.

It is an amenable number.

217506213448 is a deficient number, since it is larger than the sum of its proper divisors (214350591512).

217506213448 is a wasteful number, since it uses less digits than its factorization.

217506213448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159277 (or 159273 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 217506213448 in words is "two hundred seventeen billion, five hundred six million, two hundred thirteen thousand, four hundred forty-eight".