528730031 has 4 divisors (see below), whose sum is σ = 536621592. Its totient is φ = 520838472.

The previous prime is 528730019. The next prime is 528730061. The reversal of 528730031 is 130037825.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 528730031 - 2¹⁸ = 528467887 is a prime.

It is a super-2 number, since 2×528730031² = 559110891362521922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 528729976 and 528730003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528730061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3945680 + ... + 3945813.

It is an arithmetic number, because the mean of its divisors is an integer number (134155398).

Almost surely, 2^528730031 is an apocalyptic number.

528730031 is a deficient number, since it is larger than the sum of its proper divisors (7891561).

528730031 is an equidigital number, since it uses as much as digits as its factorization.

528730031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891560.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 528730031 is about 22994.1303597244. The cubic root of 528730031 is about 808.6203364275.

Adding to 528730031 its reverse (130037825), we get a palindrome (658767856).

The spelling of 528730031 in words is "five hundred twenty-eight million, seven hundred thirty thousand, thirty-one".