216970326 has 24 divisors (see below), whose sum is σ = 487514664. Its totient is φ = 72323280.

The previous prime is 216970301. The next prime is 216970343. The reversal of 216970326 is 623079612.

It is a super-2 number, since 2×216970326² = 94152244729092552, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 222735 + ... + 223706.

It is an arithmetic number, because the mean of its divisors is an integer number (20313111).

Almost surely, 2^216970326 is an apocalyptic number.

216970326 is an abundant number, since it is smaller than the sum of its proper divisors (270544338).

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

216970326 is an equidigital number, since it uses as much as digits as its factorization.

216970326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446458 (or 446446 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 216970326 is about 14729.9126270321. The cubic root of 216970326 is about 600.8971079936.

It can be divided in two parts, 2169703 and 26, that added together give a square (2169729 = 1473²).

The spelling of 216970326 in words is "two hundred sixteen million, nine hundred seventy thousand, three hundred twenty-six".