51028529 has 4 divisors (see below), whose sum is σ = 51070320. Its totient is φ = 50986740.

The previous prime is 51028519. The next prime is 51028531. The reversal of 51028529 is 92582015.

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.

It is a cyclic number.

It is not a de Polignac number, because 51028529 - 2⁸ = 51028273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51028495 and 51028504.

It is not an unprimeable number, because it can be changed into a prime (51028519) 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, 19007 + ... + 21524.

It is an arithmetic number, because the mean of its divisors is an integer number (12767580).

Almost surely, 2^51028529 is an apocalyptic number.

It is an amenable number.

51028529 is a deficient number, since it is larger than the sum of its proper divisors (41791).

51028529 is a wasteful number, since it uses less digits than its factorization.

51028529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41790.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51028529 is about 7143.4255788102. The cubic root of 51028529 is about 370.9121129211.

It can be divided in two parts, 5102 and 8529, that added together give a palindrome (13631).

The spelling of 51028529 in words is "fifty-one million, twenty-eight thousand, five hundred twenty-nine".