51033521 has 8 divisors (see below), whose sum is σ = 63626304. Its totient is φ = 39766320.

The previous prime is 51033517. The next prime is 51033523. The reversal of 51033521 is 12533015.

51033521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51033521 - 2² = 51033517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51033493 and 51033502.

It is not an unprimeable number, because it can be changed into a prime (51033523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331310 + ... + 331463.

It is an arithmetic number, because the mean of its divisors is an integer number (7953288).

Almost surely, 2^51033521 is an apocalyptic number.

It is an amenable number.

51033521 is a deficient number, since it is larger than the sum of its proper divisors (12592783).

51033521 is a wasteful number, since it uses less digits than its factorization.

51033521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662791.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 51033521 is about 7143.7749824585. The cubic root of 51033521 is about 370.9242076775.

Adding to 51033521 its reverse (12533015), we get a palindrome (63566536).

The spelling of 51033521 in words is "fifty-one million, thirty-three thousand, five hundred twenty-one".