2011157 has 4 divisors (see below), whose sum is σ = 2018016. Its totient is φ = 2004300.

The previous prime is 2011147. The next prime is 2011171. The reversal of 2011157 is 7511102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011157 - 2⁸ = 2010901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 3582.

It is an arithmetic number, because the mean of its divisors is an integer number (504504).

2^2011157 is an apocalyptic number.

It is an amenable number.

2011157 is a deficient number, since it is larger than the sum of its proper divisors (6859).

2011157 is an equidigital number, since it uses as much as digits as its factorization.

2011157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6858.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 2011157 is about 1418.1526716119. The cubic root of 2011157 is about 126.2259530059.

Adding to 2011157 its reverse (7511102), we get a palindrome (9522259).

Subtracting 2011157 from its reverse (7511102), we obtain a palindrome (5499945).

The spelling of 2011157 in words is "two million, eleven thousand, one hundred fifty-seven".