51528121 has 8 divisors (see below), whose sum is σ = 52761600. Its totient is φ = 50300448.

The previous prime is 51528109. The next prime is 51528149. The reversal of 51528121 is 12182515.

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

It is a cyclic number.

It is not a de Polignac number, because 51528121 - 2⁵ = 51528089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51528101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20280 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (6595200).

Almost surely, 2^51528121 is an apocalyptic number.

It is an amenable number.

51528121 is a deficient number, since it is larger than the sum of its proper divisors (1233479).

51528121 is a wasteful number, since it uses less digits than its factorization.

51528121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903.

The product of its digits is 800, while the sum is 25.

The square root of 51528121 is about 7178.3090627250. The cubic root of 51528121 is about 372.1186488028.

The spelling of 51528121 in words is "fifty-one million, five hundred twenty-eight thousand, one hundred twenty-one".