131505401403 has 6 divisors (see below), whose sum is σ = 189952246484. Its totient is φ = 87670267596.

The previous prime is 131505401393. The next prime is 131505401411. The reversal of 131505401403 is 304104505131.

It is a happy number.

131505401403 is a `hidden beast` number, since 1 + 31 + 50 + 540 + 1 + 40 + 3 = 666.

It is not a de Polignac number, because 131505401403 - 2²⁴ = 131488624187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131505401483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7305855625 + ... + 7305855642.

Almost surely, 2^131505401403 is an apocalyptic number.

131505401403 is a deficient number, since it is larger than the sum of its proper divisors (58446845081).

131505401403 is a wasteful number, since it uses less digits than its factorization.

131505401403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14611711273 (or 14611711270 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 131505401403 its reverse (304104505131), we get a palindrome (435609906534).

The spelling of 131505401403 in words is "one hundred thirty-one billion, five hundred five million, four hundred one thousand, four hundred three".