2131434305556 has 48 divisors (see below), whose sum is σ = 5286934551360. Its totient is φ = 666420307200.

The previous prime is 2131434305551. The next prime is 2131434305579. The reversal of 2131434305556 is 6555034341312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131434305551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46256161 + ... + 46302216.

It is an arithmetic number, because the mean of its divisors is an integer number (110144469820).

Almost surely, 2^{2131434305556} is an apocalyptic number.

It is an amenable number.

2131434305556 is an abundant number, since it is smaller than the sum of its proper divisors (3155500245804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131434305556 is a wasteful number, since it uses less digits than its factorization.

2131434305556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92558504 (or 92558502 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

Adding to 2131434305556 its reverse (6555034341312), we get a palindrome (8686468646868).

The spelling of 2131434305556 in words is "two trillion, one hundred thirty-one billion, four hundred thirty-four million, three hundred five thousand, five hundred fifty-six".