216230464 has 28 divisors (see below), whose sum is σ = 430079404. Its totient is φ = 107864064.

The previous prime is 216230461. The next prime is 216230473. The reversal of 216230464 is 464032612.

It can be written as a sum of positive squares in 2 ways, for example, as 112190464 + 104040000 = 10592^2 + 10200^2 .

It is a super-2 number, since 2×216230464² = 93511227123310592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216230461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25552 + ... + 32944.

Almost surely, 2^216230464 is an apocalyptic number.

It is an amenable number.

216230464 is a deficient number, since it is larger than the sum of its proper divisors (213848940).

216230464 is an equidigital number, since it uses as much as digits as its factorization.

216230464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862 (or 7852 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 216230464 is about 14704.7769109225. The cubic root of 216230464 is about 600.2133167435.

The spelling of 216230464 in words is "two hundred sixteen million, two hundred thirty thousand, four hundred sixty-four".