11231557 has 8 divisors (see below), whose sum is σ = 11547360. Its totient is φ = 10918320.

The previous prime is 11231537. The next prime is 11231629. The reversal of 11231557 is 75513211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11231557 - 2¹¹ = 11229509 is a prime.

It is a super-2 number, since 2×11231557² = 252295745288498, 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 (11231537) 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 7 ways as a sum of consecutive naturals, for example, 11082 + ... + 12052.

It is an arithmetic number, because the mean of its divisors is an integer number (1443420).

Almost surely, 2^11231557 is an apocalyptic number.

It is an amenable number.

11231557 is a deficient number, since it is larger than the sum of its proper divisors (315803).

11231557 is an equidigital number, since it uses as much as digits as its factorization.

11231557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 1050, while the sum is 25.

The square root of 11231557 is about 3351.3515184176. The cubic root of 11231557 is about 223.9477250996.

Adding to 11231557 its reverse (75513211), we get a palindrome (86744768).

The spelling of 11231557 in words is "eleven million, two hundred thirty-one thousand, five hundred fifty-seven".