216233770 has 16 divisors (see below), whose sum is σ = 389529000. Its totient is φ = 86425024.

The previous prime is 216233753. The next prime is 216233779. The reversal of 216233770 is 77332612.

It can be written as a sum of positive squares in 4 ways, for example, as 176278729 + 39955041 = 13277^2 + 6321^2 .

It is not an unprimeable number, because it can be changed into a prime (216233779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5856 + ... + 21604.

Almost surely, 2^216233770 is an apocalyptic number.

216233770 is a deficient number, since it is larger than the sum of its proper divisors (173295230).

216233770 is a wasteful number, since it uses less digits than its factorization.

216233770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17129.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 216233770 is about 14704.8893229429. The cubic root of 216233770 is about 600.2163756636.

The spelling of 216233770 in words is "two hundred sixteen million, two hundred thirty-three thousand, seven hundred seventy".