216922041 has 12 divisors (see below), whose sum is σ = 358093632. Its totient is φ = 123955416.

The previous prime is 216922037. The next prime is 216922051. The reversal of 216922041 is 140229612.

It is not a de Polignac number, because 216922041 - 2² = 216922037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216921996 and 216922014.

It is not an unprimeable number, because it can be changed into a prime (216922051) 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, 1721541 + ... + 1721666.

It is an arithmetic number, because the mean of its divisors is an integer number (29841136).

Almost surely, 2^216922041 is an apocalyptic number.

216922041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216922041 is a deficient number, since it is larger than the sum of its proper divisors (141171591).

216922041 is a wasteful number, since it uses less digits than its factorization.

216922041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443220 (or 3443217 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 216922041 is about 14728.2735240761. The cubic root of 216922041 is about 600.8525297480.

The spelling of 216922041 in words is "two hundred sixteen million, nine hundred twenty-two thousand, forty-one".