216464326 has 24 divisors (see below), whose sum is σ = 353841480. Its totient is φ = 99268416.

The previous prime is 216464291. The next prime is 216464329. The reversal of 216464326 is 623464612.

It is a junction number, because it is equal to n+sod(n) for n = 216464291 and 216464300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216464329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53130 + ... + 57058.

It is an arithmetic number, because the mean of its divisors is an integer number (14743395).

Almost surely, 2^216464326 is an apocalyptic number.

216464326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

216464326 is a deficient number, since it is larger than the sum of its proper divisors (137377154).

216464326 is a wasteful number, since it uses less digits than its factorization.

216464326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120 (or 4107 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The square root of 216464326 is about 14712.7266677527. The cubic root of 216464326 is about 600.4296237804.

The spelling of 216464326 in words is "two hundred sixteen million, four hundred sixty-four thousand, three hundred twenty-six".