217065150270521 has 12 divisors (see below), whose sum is σ = 252506399468688. Its totient is φ = 186054339201192.

The previous prime is 217065150270421. The next prime is 217065150270637. The reversal of 217065150270521 is 125072051560712.

It is not a de Polignac number, because 217065150270521 - 2⁴⁶ = 146696406092857 is a prime.

It is a super-2 number, since 2×217065150270521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217065150270421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11758151 + ... + 23924556.

It is an arithmetic number, because the mean of its divisors is an integer number (21042199955724).

Almost surely, 2^{217065150270521} is an apocalyptic number.

It is an amenable number.

217065150270521 is a deficient number, since it is larger than the sum of its proper divisors (35441249198167).

217065150270521 is a wasteful number, since it uses less digits than its factorization.

217065150270521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35806868 (or 35806861 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 217065150270521 in words is "two hundred seventeen trillion, sixty-five billion, one hundred fifty million, two hundred seventy thousand, five hundred twenty-one".