528513006121 has 3 divisors (see below), whose sum is σ = 528513733111. Its totient is φ = 528512279132.

The previous prime is 528513006107. The next prime is 528513006139. The reversal of 528513006121 is 121600315825.

The square root of 528513006121 is 726989.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 515539796121 + 12973210000 = 718011^2 + 113900^2 .

It is a de Polignac number, because none of the positive numbers 2^k-528513006121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (528513006821) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 363495 + ... + 1090483.

Almost surely, 2^528513006121 is an apocalyptic number.

528513006121 is the 726989-th square number.

528513006121 is the 363495-th centered octagonal number.

It is an amenable number.

528513006121 is a deficient number, since it is larger than the sum of its proper divisors (726990).

528513006121 is an frugal number, since it uses more digits than its factorization.

528513006121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453978 (or 726989 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 528513006121 in words is "five hundred twenty-eight billion, five hundred thirteen million, six thousand, one hundred twenty-one".