11531023 has 12 divisors (see below), whose sum is σ = 13518120. Its totient is φ = 9806832.

The previous prime is 11531021. The next prime is 11531029. The reversal of 11531023 is 32013511.

It is not a de Polignac number, because 11531023 - 2¹ = 11531021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11530988 and 11531006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5965 + ... + 7657.

It is an arithmetic number, because the mean of its divisors is an integer number (1126510).

Almost surely, 2^11531023 is an apocalyptic number.

11531023 is a deficient number, since it is larger than the sum of its proper divisors (1987097).

11531023 is a wasteful number, since it uses less digits than its factorization.

11531023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1839 counting only the distinct ones).

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

The square root of 11531023 is about 3395.7360026951. The cubic root of 11531023 is about 225.9206589689.

Adding to 11531023 its reverse (32013511), we get a palindrome (43544534).

The spelling of 11531023 in words is "eleven million, five hundred thirty-one thousand, twenty-three".