13431513550 has 96 divisors (see below), whose sum is σ = 32084946432. Its totient is φ = 4066001280.

The previous prime is 13431513547. The next prime is 13431513551. The reversal of 13431513550 is 5531513431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431513551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40477 + ... + 168823.

It is an arithmetic number, because the mean of its divisors is an integer number (334218192).

Almost surely, 2^13431513550 is an apocalyptic number.

13431513550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13431513550 is an abundant number, since it is smaller than the sum of its proper divisors (18653432882).

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

13431513550 is a wasteful number, since it uses less digits than its factorization.

13431513550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128402 (or 128397 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 13431513550 in words is "thirteen billion, four hundred thirty-one million, five hundred thirteen thousand, five hundred fifty".