11157331 has 4 divisors (see below), whose sum is σ = 11245312. Its totient is φ = 11069352.

The previous prime is 11157329. The next prime is 11157353. The reversal of 11157331 is 13375111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11157331 - 2¹ = 11157329 is a prime.

It is a super-2 number, since 2×11157331² = 248972070087122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11152331) 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, 43800 + ... + 44053.

It is an arithmetic number, because the mean of its divisors is an integer number (2811328).

Almost surely, 2^11157331 is an apocalyptic number.

11157331 is a deficient number, since it is larger than the sum of its proper divisors (87981).

11157331 is an equidigital number, since it uses as much as digits as its factorization.

11157331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87980.

The product of its digits is 315, while the sum is 22.

The square root of 11157331 is about 3340.2591216850. The cubic root of 11157331 is about 223.4532998200.

The spelling of 11157331 in words is "eleven million, one hundred fifty-seven thousand, three hundred thirty-one".