11431134550 has 144 divisors (see below), whose sum is σ = 24550147440. Its totient is φ = 3926560000.

The previous prime is 11431134541. The next prime is 11431134557. The reversal of 11431134550 is 5543113411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431134557) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29385756 + ... + 29386144.

It is an arithmetic number, because the mean of its divisors is an integer number (170487135).

Almost surely, 2^11431134550 is an apocalyptic number.

11431134550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11431134550 is an abundant number, since it is smaller than the sum of its proper divisors (13119012890).

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

11431134550 is a wasteful number, since it uses less digits than its factorization.

11431134550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 11431134550 its reverse (5543113411), we get a palindrome (16974247961).

The spelling of 11431134550 in words is "eleven billion, four hundred thirty-one million, one hundred thirty-four thousand, five hundred fifty".