13431013331550 has 96 divisors (see below), whose sum is σ = 33362984453760. Its totient is φ = 3575791305600.

The previous prime is 13431013331539. The next prime is 13431013331573. The reversal of 13431013331550 is 5513331013431.

It is a super-2 number, since 2×13431013331550² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1125529384 + ... + 1125541316.

It is an arithmetic number, because the mean of its divisors is an integer number (347531088060).

Almost surely, 2^{13431013331550} is an apocalyptic number.

13431013331550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13431013331550 is an abundant number, since it is smaller than the sum of its proper divisors (19931971122210).

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

13431013331550 is a wasteful number, since it uses less digits than its factorization.

13431013331550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23498 (or 23493 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 33.

Adding to 13431013331550 its reverse (5513331013431), we get a palindrome (18944344344981).

The spelling of 13431013331550 in words is "thirteen trillion, four hundred thirty-one billion, thirteen million, three hundred thirty-one thousand, five hundred fifty".