216422437 has 16 divisors (see below), whose sum is σ = 270876672. Its totient is φ = 167983920.

The previous prime is 216422431. The next prime is 216422519. The reversal of 216422437 is 734224612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 216422437 - 2¹⁵ = 216389669 is a prime.

It is a super-4 number, since 4×216422437⁴ (a number of 34 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216422399 and 216422408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216422431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14908 + ... + 25594.

It is an arithmetic number, because the mean of its divisors is an integer number (16929792).

Almost surely, 2^216422437 is an apocalyptic number.

It is an amenable number.

216422437 is a deficient number, since it is larger than the sum of its proper divisors (54454235).

216422437 is a wasteful number, since it uses less digits than its factorization.

216422437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968.

The product of its digits is 16128, while the sum is 31.

The square root of 216422437 is about 14711.3030354214. The cubic root of 216422437 is about 600.3908906559.

The spelling of 216422437 in words is "two hundred sixteen million, four hundred twenty-two thousand, four hundred thirty-seven".