1522221999 has 16 divisors (see below), whose sum is σ = 2064344064. Its totient is φ = 997480800.

The previous prime is 1522221989. The next prime is 1522222019. The reversal of 1522221999 is 9991222251.

It is not a de Polignac number, because 1522221999 - 2¹⁶ = 1522156463 is a prime.

It is a super-3 number, since 3×1522221999³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1522221999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522221989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463734 + ... + 467004.

It is an arithmetic number, because the mean of its divisors is an integer number (129021504).

Almost surely, 2^1522221999 is an apocalyptic number.

1522221999 is a deficient number, since it is larger than the sum of its proper divisors (542122065).

1522221999 is a wasteful number, since it uses less digits than its factorization.

1522221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5878.

The product of its digits is 58320, while the sum is 42.

The square root of 1522221999 is about 39015.6635083911. The cubic root of 1522221999 is about 1150.3394080727.

The spelling of 1522221999 in words is "one billion, five hundred twenty-two million, two hundred twenty-one thousand, nine hundred ninety-nine".