131504553 has 24 divisors (see below), whose sum is σ = 197765568. Its totient is φ = 87323184.

The previous prime is 131504551. The next prime is 131504557. The reversal of 131504553 is 355405131.

It is not a de Polignac number, because 131504553 - 2¹ = 131504551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131504551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70276 + ... + 72122.

It is an arithmetic number, because the mean of its divisors is an integer number (8240232).

Almost surely, 2^131504553 is an apocalyptic number.

It is an amenable number.

131504553 is a deficient number, since it is larger than the sum of its proper divisors (66261015).

131504553 is an equidigital number, since it uses as much as digits as its factorization.

131504553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155 (or 2143 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 131504553 is about 11467.5434596953. The cubic root of 131504553 is about 508.5265081333.

Adding to 131504553 its reverse (355405131), we get a palindrome (486909684).

The spelling of 131504553 in words is "one hundred thirty-one million, five hundred four thousand, five hundred fifty-three".