10011557 has 2 divisors, whose sum is σ = 10011558. Its totient is φ = 10011556.

The previous prime is 10011539. The next prime is 10011559. The reversal of 10011557 is 75511001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9247681 + 763876 = 3041^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011557 - 2⁶ = 10011493 is a prime.

Together with 10011559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011559) 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 as a sum of consecutive naturals, namely, 5005778 + 5005779.

It is an arithmetic number, because the mean of its divisors is an integer number (5005779).

Almost surely, 2^10011557 is an apocalyptic number.

It is an amenable number.

10011557 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011557 is an equidigital number, since it uses as much as digits as its factorization.

10011557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 10011557 is about 3164.1044546601. The cubic root of 10011557 is about 215.5264330566.

Adding to 10011557 its reverse (75511001), we get a palindrome (85522558).

The spelling of 10011557 in words is "ten million, eleven thousand, five hundred fifty-seven".