216145424 has 20 divisors (see below), whose sum is σ = 456853200. Its totient is φ = 98247840.

The previous prime is 216145411. The next prime is 216145427. The reversal of 216145424 is 424541612.

It is a super-2 number, since 2×216145424² = 93437688632279552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216145427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613874 + ... + 614225.

It is an arithmetic number, because the mean of its divisors is an integer number (22842660).

Almost surely, 2^216145424 is an apocalyptic number.

It is an amenable number.

216145424 is an abundant number, since it is smaller than the sum of its proper divisors (240707776).

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

216145424 is a wasteful number, since it uses less digits than its factorization.

216145424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228118 (or 1228112 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 216145424 is about 14701.8850492037. The cubic root of 216145424 is about 600.1346216446.

The spelling of 216145424 in words is "two hundred sixteen million, one hundred forty-five thousand, four hundred twenty-four".