10005557 has 4 divisors (see below), whose sum is σ = 10021356. Its totient is φ = 9989760.

The previous prime is 10005539. The next prime is 10005559. The reversal of 10005557 is 75550001.

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 7043716 + 2961841 = 2654^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 10005557 - 2¹² = 10001461 is a prime.

It is a super-2 number, since 2×10005557² = 200222341760498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10005559) 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 3 ways as a sum of consecutive naturals, for example, 6908 + ... + 8229.

It is an arithmetic number, because the mean of its divisors is an integer number (2505339).

Almost surely, 2^10005557 is an apocalyptic number.

It is an amenable number.

10005557 is a deficient number, since it is larger than the sum of its proper divisors (15799).

10005557 is an equidigital number, since it uses as much as digits as its factorization.

10005557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15798.

The product of its (nonzero) digits is 875, while the sum is 23.

The square root of 10005557 is about 3163.1561769853. The cubic root of 10005557 is about 215.4833689252.

Adding to 10005557 its reverse (75550001), we get a palindrome (85555558).

The spelling of 10005557 in words is "ten million, five thousand, five hundred fifty-seven".