11231157 has 16 divisors (see below), whose sum is σ = 17188992. Its totient is φ = 6389760.

The previous prime is 11231141. The next prime is 11231159. The reversal of 11231157 is 75113211.

It is a happy number.

It is not a de Polignac number, because 11231157 - 2⁴ = 11231141 is a prime.

It is a super-2 number, since 2×11231157² = 252277775117298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4357 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (1074312).

Almost surely, 2^11231157 is an apocalyptic number.

It is an amenable number.

11231157 is a deficient number, since it is larger than the sum of its proper divisors (5957835).

11231157 is a wasteful number, since it uses less digits than its factorization.

11231157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348.

The product of its digits is 210, while the sum is 21.

The square root of 11231157 is about 3351.2918404699. The cubic root of 11231157 is about 223.9450665144.

Adding to 11231157 its reverse (75113211), we get a palindrome (86344368).

The spelling of 11231157 in words is "eleven million, two hundred thirty-one thousand, one hundred fifty-seven".