406222143 has 8 divisors (see below), whose sum is σ = 543191808. Its totient is φ = 270033624.

The previous prime is 406222099. The next prime is 406222189. The reversal of 406222143 is 341222604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406222143 - 2¹² = 406218047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406222643) 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 7 ways as a sum of consecutive naturals, for example, 194071 + ... + 196152.

It is an arithmetic number, because the mean of its divisors is an integer number (67898976).

Almost surely, 2^406222143 is an apocalyptic number.

406222143 is a deficient number, since it is larger than the sum of its proper divisors (136969665).

406222143 is a wasteful number, since it uses less digits than its factorization.

406222143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390573.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 406222143 is about 20154.9533117792. The cubic root of 406222143 is about 740.6070882527.

Adding to 406222143 its reverse (341222604), we get a palindrome (747444747).

The spelling of 406222143 in words is "four hundred six million, two hundred twenty-two thousand, one hundred forty-three".