1622221571 has 4 divisors (see below), whose sum is σ = 1623344112. Its totient is φ = 1621099032.

The previous prime is 1622221567. The next prime is 1622221597. The reversal of 1622221571 is 1751222261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1751222261 = 1223 ⋅1431907.

It is a cyclic number.

It is not a de Polignac number, because 1622221571 - 2² = 1622221567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622221771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559100 + ... + 561993.

It is an arithmetic number, because the mean of its divisors is an integer number (405836028).

Almost surely, 2^1622221571 is an apocalyptic number.

1622221571 is a deficient number, since it is larger than the sum of its proper divisors (1122541).

1622221571 is a wasteful number, since it uses less digits than its factorization.

1622221571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122540.

The product of its digits is 3360, while the sum is 29.

The square root of 1622221571 is about 40276.8118276509. The cubic root of 1622221571 is about 1174.9969086383.

The spelling of 1622221571 in words is "one billion, six hundred twenty-two million, two hundred twenty-one thousand, five hundred seventy-one".