22216429 has 4 divisors (see below), whose sum is σ = 22933120. Its totient is φ = 21499740.

The previous prime is 22216417. The next prime is 22216451. The reversal of 22216429 is 92461222.

22216429 = T₃₈₄₇ + T₃₈₄₈ + T₃₈₄₉.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-22216429 is a prime.

It is a super-4 number, since 4×22216429⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22216397 and 22216406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358299 + ... + 358360.

It is an arithmetic number, because the mean of its divisors is an integer number (5733280).

Almost surely, 2^22216429 is an apocalyptic number.

22216429 is the 3849-th centered triangular number.

It is an amenable number.

22216429 is a deficient number, since it is larger than the sum of its proper divisors (716691).

22216429 is an equidigital number, since it uses as much as digits as its factorization.

22216429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716690.

The product of its digits is 3456, while the sum is 28.

The square root of 22216429 is about 4713.4307038504. The cubic root of 22216429 is about 281.1197886796.

The spelling of 22216429 in words is "twenty-two million, two hundred sixteen thousand, four hundred twenty-nine".