528721161 has 8 divisors (see below), whose sum is σ = 705176064. Its totient is φ = 352373520.

The previous prime is 528721153. The next prime is 528721183. The reversal of 528721161 is 161127825.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 528721161 - 2³ = 528721153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (528721121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14505 + ... + 35606.

It is an arithmetic number, because the mean of its divisors is an integer number (88147008).

Almost surely, 2^528721161 is an apocalyptic number.

It is an amenable number.

528721161 is a deficient number, since it is larger than the sum of its proper divisors (176454903).

528721161 is a wasteful number, since it uses less digits than its factorization.

528721161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53631.

The product of its digits is 6720, while the sum is 33.

The square root of 528721161 is about 22993.9374836064. The cubic root of 528721161 is about 808.6158145845.

Adding to 528721161 its reverse (161127825), we get a palindrome (689848986).

The spelling of 528721161 in words is "five hundred twenty-eight million, seven hundred twenty-one thousand, one hundred sixty-one".