11139231 has 4 divisors (see below), whose sum is σ = 14852312. Its totient is φ = 7426152.

The previous prime is 11139229. The next prime is 11139251. The reversal of 11139231 is 13293111.

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

It is not a de Polignac number, because 11139231 - 2¹ = 11139229 is a prime.

It is a super-2 number, since 2×11139231² = 248164934542722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11139198 and 11139207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11139211) 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, 1856536 + ... + 1856541.

It is an arithmetic number, because the mean of its divisors is an integer number (3713078).

Almost surely, 2^11139231 is an apocalyptic number.

11139231 is a deficient number, since it is larger than the sum of its proper divisors (3713081).

11139231 is an equidigital number, since it uses as much as digits as its factorization.

11139231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713080.

The product of its digits is 162, while the sum is 21.

The square root of 11139231 is about 3337.5486513308. The cubic root of 11139231 is about 223.3324019169.

The spelling of 11139231 in words is "eleven million, one hundred thirty-nine thousand, two hundred thirty-one".