160143521 has 4 divisors (see below), whose sum is σ = 160202544. Its totient is φ = 160084500.

The previous prime is 160143497. The next prime is 160143527. The reversal of 160143521 is 125341061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125341061 = 503 ⋅249187.

It is a cyclic number.

It is not a de Polignac number, because 160143521 - 2¹⁸ = 159881377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (160143527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25235 + ... + 30936.

It is an arithmetic number, because the mean of its divisors is an integer number (40050636).

Almost surely, 2^160143521 is an apocalyptic number.

It is an amenable number.

160143521 is a deficient number, since it is larger than the sum of its proper divisors (59023).

160143521 is an equidigital number, since it uses as much as digits as its factorization.

160143521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59022.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 160143521 is about 12654.7825346783. The cubic root of 160143521 is about 543.0457981126.

Adding to 160143521 its reverse (125341061), we get a palindrome (285484582).

The spelling of 160143521 in words is "one hundred sixty million, one hundred forty-three thousand, five hundred twenty-one".