216122444 has 24 divisors (see below), whose sum is σ = 398170080. Its totient is φ = 102443264.

The previous prime is 216122443. The next prime is 216122461. The reversal of 216122444 is 444221612.

It is not an unprimeable number, because it can be changed into a prime (216122441) 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, 2 + ... + 20790.

It is an arithmetic number, because the mean of its divisors is an integer number (16590420).

Almost surely, 2^216122444 is an apocalyptic number.

It is an amenable number.

216122444 is a deficient number, since it is larger than the sum of its proper divisors (182047636).

216122444 is a wasteful number, since it uses less digits than its factorization.

216122444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929 (or 20927 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 216122444 is about 14701.1034959965. The cubic root of 216122444 is about 600.1133526580.

The spelling of 216122444 in words is "two hundred sixteen million, one hundred twenty-two thousand, four hundred forty-four".