1031666525 has 12 divisors (see below), whose sum is σ = 1283073012. Its totient is φ = 822877440.

The previous prime is 1031666509. The next prime is 1031666543. The reversal of 1031666525 is 5256661301.

It can be written as a sum of positive squares in 6 ways, for example, as 74011609 + 957654916 = 8603^2 + 30946^2 .

It is not a de Polignac number, because 1031666525 - 2⁴ = 1031666509 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52802 + ... + 69651.

It is an arithmetic number, because the mean of its divisors is an integer number (106922751).

Almost surely, 2^1031666525 is an apocalyptic number.

It is an amenable number.

1031666525 is a deficient number, since it is larger than the sum of its proper divisors (251406487).

1031666525 is a wasteful number, since it uses less digits than its factorization.

1031666525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122800 (or 122795 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1031666525 is about 32119.5660773928. The cubic root of 1031666525 is about 1010.4460092706.

The spelling of 1031666525 in words is "one billion, thirty-one million, six hundred sixty-six thousand, five hundred twenty-five".