217525043732 has 48 divisors (see below), whose sum is σ = 399807576000. Its totient is φ = 103447471104.

The previous prime is 217525043689. The next prime is 217525043737. The reversal of 217525043732 is 237340525712.

It is a self number, because there is not a number n which added to its sum of digits gives 217525043732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217525043737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1493444 + ... + 1632612.

It is an arithmetic number, because the mean of its divisors is an integer number (8329324500).

Almost surely, 2^217525043732 is an apocalyptic number.

It is an amenable number.

217525043732 is a deficient number, since it is larger than the sum of its proper divisors (182282532268).

217525043732 is a wasteful number, since it uses less digits than its factorization.

217525043732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139448 (or 139446 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 41.

The spelling of 217525043732 in words is "two hundred seventeen billion, five hundred twenty-five million, forty-three thousand, seven hundred thirty-two".