131123553 has 16 divisors (see below), whose sum is σ = 192618432. Its totient is φ = 78680000.

The previous prime is 131123539. The next prime is 131123569. The reversal of 131123553 is 355321131.

It is a cyclic number.

It is not a de Polignac number, because 131123553 - 2¹⁷ = 130992481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131128553) 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 15 ways as a sum of consecutive naturals, for example, 16338 + ... + 23003.

It is an arithmetic number, because the mean of its divisors is an integer number (12038652).

Almost surely, 2^131123553 is an apocalyptic number.

It is an amenable number.

131123553 is a deficient number, since it is larger than the sum of its proper divisors (61494879).

131123553 is a wasteful number, since it uses less digits than its factorization.

131123553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39456.

The product of its digits is 1350, while the sum is 24.

The square root of 131123553 is about 11450.9193080730. The cubic root of 131123553 is about 508.0349256270.

Adding to 131123553 its reverse (355321131), we get a palindrome (486444684).

The spelling of 131123553 in words is "one hundred thirty-one million, one hundred twenty-three thousand, five hundred fifty-three".