216523400200 has 48 divisors (see below), whose sum is σ = 533029672980. Its totient is φ = 81514690560.

The previous prime is 216523400167. The next prime is 216523400237. The reversal of 216523400200 is 2004325612.

It can be written as a sum of positive squares in 6 ways, for example, as 39624087364 + 176899312836 = 199058^2 + 420594^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31838277 + ... + 31845076.

Almost surely, 2^216523400200 is an apocalyptic number.

216523400200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216523400200 is an abundant number, since it is smaller than the sum of its proper divisors (316506272780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216523400200 is a wasteful number, since it uses less digits than its factorization.

216523400200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63683386 (or 63683377 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 216523400200 its reverse (2004325612), we get a palindrome (218527725812).

The spelling of 216523400200 in words is "two hundred sixteen billion, five hundred twenty-three million, four hundred thousand, two hundred".