21528143219 has 12 divisors (see below), whose sum is σ = 23687515992. Its totient is φ = 19550900160.

The previous prime is 21528143213. The next prime is 21528143281. The reversal of 21528143219 is 91234182512.

It is not a de Polignac number, because 21528143219 - 2⁸ = 21528142963 is a prime.

It is a super-2 number, since 2×21528143219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21528143213) 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 11 ways as a sum of consecutive naturals, for example, 27164 + ... + 209270.

It is an arithmetic number, because the mean of its divisors is an integer number (1973959666).

Almost surely, 2^21528143219 is an apocalyptic number.

21528143219 is a deficient number, since it is larger than the sum of its proper divisors (2159372773).

21528143219 is a wasteful number, since it uses less digits than its factorization.

21528143219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183106 (or 183095 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The spelling of 21528143219 in words is "twenty-one billion, five hundred twenty-eight million, one hundred forty-three thousand, two hundred nineteen".