211217523994 has 16 divisors (see below), whose sum is σ = 317493237600. Its totient is φ = 105386503984.

The previous prime is 211217523989. The next prime is 211217524009. The reversal of 211217523994 is 499325712112.

It is a super-2 number, since 2×211217523994² (a number of 23 digits) contains 22 as substring.

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, 12756429 + ... + 12772975.

It is an arithmetic number, because the mean of its divisors is an integer number (19843327350).

Almost surely, 2^211217523994 is an apocalyptic number.

211217523994 is a deficient number, since it is larger than the sum of its proper divisors (106275713606).

211217523994 is a wasteful number, since it uses less digits than its factorization.

211217523994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29597.

The product of its digits is 272160, while the sum is 46.

The spelling of 211217523994 in words is "two hundred eleven billion, two hundred seventeen million, five hundred twenty-three thousand, nine hundred ninety-four".