131123530 has 8 divisors (see below), whose sum is σ = 236022372. Its totient is φ = 52449408.

The previous prime is 131123519. The next prime is 131123539. The reversal of 131123530 is 35321131.

It can be written as a sum of positive squares in 2 ways, for example, as 129436129 + 1687401 = 11377^2 + 1299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 131123498 and 131123507.

It is not an unprimeable number, because it can be changed into a prime (131123539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6556167 + ... + 6556186.

Almost surely, 2^131123530 is an apocalyptic number.

131123530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131123530 is a deficient number, since it is larger than the sum of its proper divisors (104898842).

131123530 is a wasteful number, since it uses less digits than its factorization.

131123530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13112360.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 131123530 is about 11450.9183037868. The cubic root of 131123530 is about 508.0348959226.

Adding to 131123530 its reverse (35321131), we get a palindrome (166444661).

The spelling of 131123530 in words is "one hundred thirty-one million, one hundred twenty-three thousand, five hundred thirty".