531225028 has 24 divisors (see below), whose sum is σ = 1002445920. Its totient is φ = 245494080.

The previous prime is 531225017. The next prime is 531225029. The reversal of 531225028 is 820522135.

It is a junction number, because it is equal to n+sod(n) for n = 531224987 and 531225005.

It is not an unprimeable number, because it can be changed into a prime (531225029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82126 + ... + 88357.

It is an arithmetic number, because the mean of its divisors is an integer number (41768580).

Almost surely, 2^531225028 is an apocalyptic number.

It is an amenable number.

531225028 is a deficient number, since it is larger than the sum of its proper divisors (471220892).

531225028 is a wasteful number, since it uses less digits than its factorization.

531225028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170547 (or 170545 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 531225028 is about 23048.3194181268. The cubic root of 531225028 is about 809.8902599894.

The spelling of 531225028 in words is "five hundred thirty-one million, two hundred twenty-five thousand, twenty-eight".