217157962013 has 4 divisors (see below), whose sum is σ = 217159770240. Its totient is φ = 217156153788.

The previous prime is 217157962001. The next prime is 217157962027. The reversal of 217157962013 is 310269751712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 217157962013 - 2⁴ = 217157961997 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 (217157962513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710093 + ... + 968786.

It is an arithmetic number, because the mean of its divisors is an integer number (54289942560).

Almost surely, 2^217157962013 is an apocalyptic number.

It is an amenable number.

217157962013 is a deficient number, since it is larger than the sum of its proper divisors (1808227).

217157962013 is a wasteful number, since it uses less digits than its factorization.

217157962013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808226.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 217157962013 in words is "two hundred seventeen billion, one hundred fifty-seven million, nine hundred sixty-two thousand, thirteen".