1005422221 has 8 divisors (see below), whose sum is σ = 1061294400. Its totient is φ = 949845600.

The previous prime is 1005422219. The next prime is 1005422233. The reversal of 1005422221 is 1222245001.

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

It is a cyclic number.

It is not a de Polignac number, because 1005422221 - 2¹ = 1005422219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005422251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66880 + ... + 80521.

It is an arithmetic number, because the mean of its divisors is an integer number (132661800).

Almost surely, 2^1005422221 is an apocalyptic number.

It is an amenable number.

1005422221 is a deficient number, since it is larger than the sum of its proper divisors (55872179).

1005422221 is a wasteful number, since it uses less digits than its factorization.

1005422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147779.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1005422221 is about 31708.3935417738. The cubic root of 1005422221 is about 1001.8041500850.

Adding to 1005422221 its reverse (1222245001), we get a palindrome (2227667222).

The spelling of 1005422221 in words is "one billion, five million, four hundred twenty-two thousand, two hundred twenty-one".