11551112530231 has 4 divisors (see below), whose sum is σ = 11746894098600. Its totient is φ = 11355330961864.

The previous prime is 11551112530207. The next prime is 11551112530283. The reversal of 11551112530231 is 13203521115511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11551112530231 - 2¹⁷ = 11551112399159 is a prime.

It is a super-2 number, since 2×11551112530231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11551112530193 and 11551112530202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551112539231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 97890784096 + ... + 97890784213.

It is an arithmetic number, because the mean of its divisors is an integer number (2936723524650).

Almost surely, 2^{11551112530231} is an apocalyptic number.

11551112530231 is a deficient number, since it is larger than the sum of its proper divisors (195781568369).

11551112530231 is an equidigital number, since it uses as much as digits as its factorization.

11551112530231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195781568368.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 11551112530231 its reverse (13203521115511), we get a palindrome (24754633645742).

The spelling of 11551112530231 in words is "eleven trillion, five hundred fifty-one billion, one hundred twelve million, five hundred thirty thousand, two hundred thirty-one".