11523031 has 4 divisors (see below), whose sum is σ = 12409432. Its totient is φ = 10636632.

The previous prime is 11523013. The next prime is 11523047. The reversal of 11523031 is 13032511.

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 11523031 - 2⁵ = 11522999 is a prime.

It is a super-2 number, since 2×11523031² = 265560486853922, 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 = 11522996 and 11523014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443181 + ... + 443206.

It is an arithmetic number, because the mean of its divisors is an integer number (3102358).

Almost surely, 2^11523031 is an apocalyptic number.

11523031 is a deficient number, since it is larger than the sum of its proper divisors (886401).

11523031 is an equidigital number, since it uses as much as digits as its factorization.

11523031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886400.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 11523031 is about 3394.5590287989. The cubic root of 11523031 is about 225.8684526959.

Adding to 11523031 its reverse (13032511), we get a palindrome (24555542).

The spelling of 11523031 in words is "eleven million, five hundred twenty-three thousand, thirty-one".