13405504331531 has 8 divisors (see below), whose sum is σ = 14532304239264. Its totient is φ = 12292362604800.

The previous prime is 13405504331519. The next prime is 13405504331567. The reversal of 13405504331531 is 13513340550431.

13405504331531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13405504331531 is a prime.

It is a super-2 number, since 2×13405504331531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13405504336531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3414543206 + ... + 3414547131.

It is an arithmetic number, because the mean of its divisors is an integer number (1816538029908).

Almost surely, 2^{13405504331531} is an apocalyptic number.

13405504331531 is a deficient number, since it is larger than the sum of its proper divisors (1126799907733).

13405504331531 is a wasteful number, since it uses less digits than its factorization.

13405504331531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829090501.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 13405504331531 its reverse (13513340550431), we get a palindrome (26918844881962).

The spelling of 13405504331531 in words is "thirteen trillion, four hundred five billion, five hundred four million, three hundred thirty-one thousand, five hundred thirty-one".