131623111 has 4 divisors (see below), whose sum is σ = 131670000. Its totient is φ = 131576224.

The previous prime is 131623109. The next prime is 131623147. The reversal of 131623111 is 111326131.

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 131623111 - 2¹ = 131623109 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 (131633111) 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, 18946 + ... + 24943.

It is an arithmetic number, because the mean of its divisors is an integer number (32917500).

Almost surely, 2^131623111 is an apocalyptic number.

131623111 is a deficient number, since it is larger than the sum of its proper divisors (46889).

131623111 is an equidigital number, since it uses as much as digits as its factorization.

131623111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46888.

The product of its digits is 108, while the sum is 19.

The square root of 131623111 is about 11472.7115800930. The cubic root of 131623111 is about 508.6792830128.

Adding to 131623111 its reverse (111326131), we get a palindrome (242949242).

The spelling of 131623111 in words is "one hundred thirty-one million, six hundred twenty-three thousand, one hundred eleven".