11231411533531 has 4 divisors (see below), whose sum is σ = 12835898895472. Its totient is φ = 9626924171592.

The previous prime is 11231411533499. The next prime is 11231411533541. The reversal of 11231411533531 is 13533511413211.

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

It is not a de Polignac number, because 11231411533531 - 2⁵ = 11231411533499 is a prime.

It is a super-2 number, since 2×11231411533531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11231411533541) 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, 802243680960 + ... + 802243680973.

It is an arithmetic number, because the mean of its divisors is an integer number (3208974723868).

Almost surely, 2^{11231411533531} is an apocalyptic number.

11231411533531 is a deficient number, since it is larger than the sum of its proper divisors (1604487361941).

11231411533531 is an equidigital number, since it uses as much as digits as its factorization.

11231411533531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604487361940.

The product of its digits is 16200, while the sum is 34.

Adding to 11231411533531 its reverse (13533511413211), we get a palindrome (24764922946742).

The spelling of 11231411533531 in words is "eleven trillion, two hundred thirty-one billion, four hundred eleven million, five hundred thirty-three thousand, five hundred thirty-one".