131551044403 has 4 divisors (see below), whose sum is σ = 132218816400. Its totient is φ = 130883272408.

The previous prime is 131551044389. The next prime is 131551044431. The reversal of 131551044403 is 304440155131.

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 131551044403 - 2⁵ = 131551044371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131551044103) 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, 333885703 + ... + 333886096.

It is an arithmetic number, because the mean of its divisors is an integer number (33054704100).

Almost surely, 2^131551044403 is an apocalyptic number.

131551044403 is a deficient number, since it is larger than the sum of its proper divisors (667771997).

131551044403 is an equidigital number, since it uses as much as digits as its factorization.

131551044403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667771996.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 131551044403 its reverse (304440155131), we get a palindrome (435991199534).

The spelling of 131551044403 in words is "one hundred thirty-one billion, five hundred fifty-one million, forty-four thousand, four hundred three".