11521510414431 has 16 divisors (see below), whose sum is σ = 15777610708704. Its totient is φ = 7473219249024.

The previous prime is 11521510414429. The next prime is 11521510414459. The reversal of 11521510414431 is 13441401512511.

It is not a de Polignac number, because 11521510414431 - 2¹ = 11521510414429 is a prime.

It is a super-2 number, since 2×11521510414431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11521510414392 and 11521510414401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521510414481) 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 15 ways as a sum of consecutive naturals, for example, 3044181 + ... + 5684193.

It is an arithmetic number, because the mean of its divisors is an integer number (986100669294).

Almost surely, 2^{11521510414431} is an apocalyptic number.

11521510414431 is a deficient number, since it is larger than the sum of its proper divisors (4256100294273).

11521510414431 is a wasteful number, since it uses less digits than its factorization.

11521510414431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679370.

The product of its (nonzero) digits is 9600, while the sum is 33.

Adding to 11521510414431 its reverse (13441401512511), we get a palindrome (24962911926942).

The spelling of 11521510414431 in words is "eleven trillion, five hundred twenty-one billion, five hundred ten million, four hundred fourteen thousand, four hundred thirty-one".