216371030 has 16 divisors (see below), whose sum is σ = 402898320. Its totient is φ = 83563872.

The previous prime is 216371027. The next prime is 216371047. The reversal of 216371030 is 30173612.

216371030 = 477² + 478² + ... + 911².

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216370987 and 216371005.

It is a congruent number.

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, 372764 + ... + 373343.

It is an arithmetic number, because the mean of its divisors is an integer number (25181145).

Almost surely, 2^216371030 is an apocalyptic number.

216371030 is a deficient number, since it is larger than the sum of its proper divisors (186527290).

216371030 is a wasteful number, since it uses less digits than its factorization.

216371030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746143.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 216371030 is about 14709.5557376829. Note that the first 3 decimals coincide. The cubic root of 216371030 is about 600.3433497770.

The spelling of 216371030 in words is "two hundred sixteen million, three hundred seventy-one thousand, thirty".