216971503203 has 64 divisors (see below), whose sum is σ = 365424482304. Its totient is φ = 111445632000.

The previous prime is 216971503153. The next prime is 216971503213. The reversal of 216971503203 is 302305179612.

It is a happy number.

It is a Cunningham number, because it is equal to 465802²-1.

It is not a de Polignac number, because 216971503203 - 2⁹ = 216971502691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (216971503213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6037498 + ... + 6073328.

It is an arithmetic number, because the mean of its divisors is an integer number (5709757536).

Almost surely, 2^216971503203 is an apocalyptic number.

216971503203 is a deficient number, since it is larger than the sum of its proper divisors (148452979101).

216971503203 is a wasteful number, since it uses less digits than its factorization.

216971503203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36436.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 216971503203 in words is "two hundred sixteen billion, nine hundred seventy-one million, five hundred three thousand, two hundred three".