2152821534 has 32 divisors (see below), whose sum is σ = 4392675360. Its totient is φ = 703245312.

The previous prime is 2152821521. The next prime is 2152821557. The reversal of 2152821534 is 4351282512.

It is a super-2 number, since 2×2152821534² = 9269281114508226312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2152821495 and 2152821504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42504 + ... + 78180.

It is an arithmetic number, because the mean of its divisors is an integer number (137271105).

Almost surely, 2^2152821534 is an apocalyptic number.

2152821534 is an abundant number, since it is smaller than the sum of its proper divisors (2239853826).

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

2152821534 is a wasteful number, since it uses less digits than its factorization.

2152821534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35884.

The product of its digits is 19200, while the sum is 33.

The square root of 2152821534 is about 46398.5078854913. The cubic root of 2152821534 is about 1291.2272306480.

It can be divided in two parts, 2152 and 821534, that added together give a triangular number (823686 = T₁₂₈₃).

The spelling of 2152821534 in words is "two billion, one hundred fifty-two million, eight hundred twenty-one thousand, five hundred thirty-four".