1621164222 has 24 divisors (see below), whose sum is σ = 3514562064. Its totient is φ = 540074304.

The previous prime is 1621164197. The next prime is 1621164257. The reversal of 1621164222 is 2224611261.

1621164222 is a `hidden beast` number, since 1 + 6 + 2 + 11 + 642 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6838 + ... + 57350.

It is an arithmetic number, because the mean of its divisors is an integer number (146440086).

Almost surely, 2^1621164222 is an apocalyptic number.

1621164222 is an abundant number, since it is smaller than the sum of its proper divisors (1893397842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621164222 is a wasteful number, since it uses less digits than its factorization.

1621164222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52304 (or 52301 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1621164222 is about 40263.6836615827. The cubic root of 1621164222 is about 1174.7415691190.

Adding to 1621164222 its reverse (2224611261), we get a palindrome (3845775483).

The spelling of 1621164222 in words is "one billion, six hundred twenty-one million, one hundred sixty-four thousand, two hundred twenty-two".