528631 has 2 divisors, whose sum is σ = 528632. Its totient is φ = 528630.

The previous prime is 528629. The next prime is 528659. The reversal of 528631 is 136825.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 528631 - 2¹ = 528629 is a prime.

It is a super-2 number, since 2×528631² = 558901468322, which contains 22 as substring.

Together with 528629, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 528596 and 528605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (528611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264315 + 264316.

It is an arithmetic number, because the mean of its divisors is an integer number (264316).

2⁵²⁸⁶³¹ is an apocalyptic number.

528631 is a deficient number, since it is larger than the sum of its proper divisors (1).

528631 is an equidigital number, since it uses as much as digits as its factorization.

528631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 528631 is about 727.0701479225. The cubic root of 528631 is about 80.8569848481.

The spelling of 528631 in words is "five hundred twenty-eight thousand, six hundred thirty-one".