11831157 has 32 divisors (see below), whose sum is σ = 19407360. Its totient is φ = 7076160.

The previous prime is 11831123. The next prime is 11831219. The reversal of 11831157 is 75113811.

It is not a de Polignac number, because 11831157 - 2¹¹ = 11829109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11831157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11831117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12532 + ... + 13442.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^11831157 is an apocalyptic number.

It is an amenable number.

11831157 is a deficient number, since it is larger than the sum of its proper divisors (7576203).

11831157 is a wasteful number, since it uses less digits than its factorization.

11831157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 964 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 11831157 is about 3439.6448944622. The cubic root of 11831157 is about 227.8640117051.

Adding to 11831157 its reverse (75113811), we get a palindrome (86944968).

The spelling of 11831157 in words is "eleven million, eight hundred thirty-one thousand, one hundred fifty-seven".