216503159401 has 3 divisors (see below), whose sum is σ = 216503624701. Its totient is φ = 216502694102.

The previous prime is 216503159347. The next prime is 216503159407. The reversal of 216503159401 is 104951305612.

The square root of 216503159401 is 465299.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 216503159401 - 2²⁵ = 216469604969 is a prime.

It is a super-2 number, since 2×216503159401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216503159407) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 232650 + ... + 697948.

Almost surely, 2^216503159401 is an apocalyptic number.

216503159401 is the 465299-th square number.

216503159401 is the 232650-th centered octagonal number.

It is an amenable number.

216503159401 is a deficient number, since it is larger than the sum of its proper divisors (465300).

216503159401 is an frugal number, since it uses more digits than its factorization.

216503159401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930598 (or 465299 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

It can be divided in two parts, 21650315 and 9401, that added together give a square (21659716 = 4654²).

The spelling of 216503159401 in words is "two hundred sixteen billion, five hundred three million, one hundred fifty-nine thousand, four hundred one".