216423422 has 24 divisors (see below), whose sum is σ = 340931136. Its totient is φ = 103029696.

The previous prime is 216423409. The next prime is 216423439. The reversal of 216423422 is 224324612.

It is a happy number.

It is a super-3 number, since 3×216423422³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216423391 and 216423400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356243 + ... + 356849.

It is an arithmetic number, because the mean of its divisors is an integer number (14205464).

Almost surely, 2^216423422 is an apocalyptic number.

216423422 is a deficient number, since it is larger than the sum of its proper divisors (124507714).

216423422 is a wasteful number, since it uses less digits than its factorization.

216423422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 969 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 216423422 is about 14711.3365130433. The cubic root of 216423422 is about 600.3918015044.

The spelling of 216423422 in words is "two hundred sixteen million, four hundred twenty-three thousand, four hundred twenty-two".