131435331405 has 32 divisors (see below), whose sum is σ = 240587618304. Its totient is φ = 60022541376.

The previous prime is 131435331383. The next prime is 131435331409. The reversal of 131435331405 is 504133534131.

It is not a de Polignac number, because 131435331405 - 2⁶ = 131435331341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131435331409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545707 + ... + 748776.

It is an arithmetic number, because the mean of its divisors is an integer number (7518363072).

Almost surely, 2^131435331405 is an apocalyptic number.

131435331405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131435331405 is a deficient number, since it is larger than the sum of its proper divisors (109152286899).

131435331405 is a wasteful number, since it uses less digits than its factorization.

131435331405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295465.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 131435331405 its reverse (504133534131), we get a palindrome (635568865536).

The spelling of 131435331405 in words is "one hundred thirty-one billion, four hundred thirty-five million, three hundred thirty-one thousand, four hundred five".