216422156 has 6 divisors (see below), whose sum is σ = 378738780. Its totient is φ = 108211076.

The previous prime is 216422153. The next prime is 216422177. The reversal of 216422156 is 651224612.

216422156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216422153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27052766 + ... + 27052773.

It is an arithmetic number, because the mean of its divisors is an integer number (63123130).

Almost surely, 2^216422156 is an apocalyptic number.

It is an amenable number.

216422156 is a deficient number, since it is larger than the sum of its proper divisors (162316624).

216422156 is a wasteful number, since it uses less digits than its factorization.

216422156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54105543 (or 54105541 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 216422156 is about 14711.2934849387. The cubic root of 216422156 is about 600.3906308093.

Adding to 216422156 its reverse (651224612), we get a palindrome (867646768).

The spelling of 216422156 in words is "two hundred sixteen million, four hundred twenty-two thousand, one hundred fifty-six".