531225785 has 4 divisors (see below), whose sum is σ = 637470948. Its totient is φ = 424980624.

The previous prime is 531225767. The next prime is 531225833. The reversal of 531225785 is 587522135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111344704 + 419881081 = 10552^2 + 20491^2 .

It is a cyclic number.

It is not a de Polignac number, because 531225785 - 2⁸ = 531225529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 53122574 + ... + 53122583.

It is an arithmetic number, because the mean of its divisors is an integer number (159367737).

Almost surely, 2^531225785 is an apocalyptic number.

It is an amenable number.

531225785 is a deficient number, since it is larger than the sum of its proper divisors (106245163).

531225785 is a wasteful number, since it uses less digits than its factorization.

531225785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106245162.

The product of its digits is 84000, while the sum is 38.

The square root of 531225785 is about 23048.3358401426. The cubic root of 531225785 is about 809.8906446893.

The spelling of 531225785 in words is "five hundred thirty-one million, two hundred twenty-five thousand, seven hundred eighty-five".