10531557 has 6 divisors (see below), whose sum is σ = 15212262. Its totient is φ = 7021032.

The previous prime is 10531523. The next prime is 10531561. The reversal of 10531557 is 75513501.

10531557 is a `hidden beast` number, since 105 + 3 + 1 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10246401 + 285156 = 3201^2 + 534^2 .

It is not a de Polignac number, because 10531557 - 2⁷ = 10531429 is a prime.

It is a super-2 number, since 2×10531557² = 221827385688498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10531557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10531457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 585078 + ... + 585095.

It is an arithmetic number, because the mean of its divisors is an integer number (2535377).

Almost surely, 2^10531557 is an apocalyptic number.

It is an amenable number.

10531557 is a deficient number, since it is larger than the sum of its proper divisors (4680705).

10531557 is a wasteful number, since it uses less digits than its factorization.

10531557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170179 (or 1170176 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 10531557 is about 3245.2360468847. The cubic root of 10531557 is about 219.1951097906.

The spelling of 10531557 in words is "ten million, five hundred thirty-one thousand, five hundred fifty-seven".