2152042143521 has 4 divisors (see below), whose sum is σ = 2152080514752. Its totient is φ = 2152003772292.

The previous prime is 2152042143509. The next prime is 2152042143523. The reversal of 2152042143521 is 1253412402512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2152042143521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152042143523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19101365 + ... + 19213698.

It is an arithmetic number, because the mean of its divisors is an integer number (538020128688).

Almost surely, 2^{2152042143521} is an apocalyptic number.

It is an amenable number.

2152042143521 is a deficient number, since it is larger than the sum of its proper divisors (38371231).

2152042143521 is an equidigital number, since it uses as much as digits as its factorization.

2152042143521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38371230.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 2152042143521 in words is "two trillion, one hundred fifty-two billion, forty-two million, one hundred forty-three thousand, five hundred twenty-one".