11550054431 has 32 divisors (see below), whose sum is σ = 12666931200. Its totient is φ = 10502432640.

The previous prime is 11550054427. The next prime is 11550054437. The reversal of 11550054431 is 13445005511.

It is a cyclic number.

It is not a de Polignac number, because 11550054431 - 2² = 11550054427 is a prime.

It is a super-2 number, since 2×11550054431² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11550054394 and 11550054403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550054437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19676120 + ... + 19676706.

It is an arithmetic number, because the mean of its divisors is an integer number (395841600).

Almost surely, 2^11550054431 is an apocalyptic number.

11550054431 is a deficient number, since it is larger than the sum of its proper divisors (1116876769).

11550054431 is a wasteful number, since it uses less digits than its factorization.

11550054431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 11550054431 its reverse (13445005511), we get a palindrome (24995059942).

The spelling of 11550054431 in words is "eleven billion, five hundred fifty million, fifty-four thousand, four hundred thirty-one".