531555925 has 6 divisors (see below), whose sum is σ = 659129378. Its totient is φ = 425244720.

The previous prime is 531555923. The next prime is 531556009. The reversal of 531555925 is 529555135.

It can be written as a sum of positive squares in 3 ways, for example, as 135466321 + 396089604 = 11639^2 + 19902^2 .

It is not a de Polignac number, because 531555925 - 2¹ = 531555923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531555923) 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 5 ways as a sum of consecutive naturals, for example, 10631094 + ... + 10631143.

Almost surely, 2^531555925 is an apocalyptic number.

It is an amenable number.

531555925 is a deficient number, since it is larger than the sum of its proper divisors (127573453).

531555925 is a wasteful number, since it uses less digits than its factorization.

531555925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21262247 (or 21262242 counting only the distinct ones).

The product of its digits is 168750, while the sum is 40.

The square root of 531555925 is about 23055.4966331242. The cubic root of 531555925 is about 810.0583837407.

The spelling of 531555925 in words is "five hundred thirty-one million, five hundred fifty-five thousand, nine hundred twenty-five".