11531033491 has 8 divisors (see below), whose sum is σ = 11555022800. Its totient is φ = 11507067360.

The previous prime is 11531033441. The next prime is 11531033497. The reversal of 11531033491 is 19433013511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11531033491 - 2⁹ = 11531032979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11531033497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1263856 + ... + 1272946.

It is an arithmetic number, because the mean of its divisors is an integer number (1444377850).

Almost surely, 2^11531033491 is an apocalyptic number.

11531033491 is a deficient number, since it is larger than the sum of its proper divisors (23989309).

11531033491 is an equidigital number, since it uses as much as digits as its factorization.

11531033491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589.

The product of its (nonzero) digits is 4860, while the sum is 31.

The spelling of 11531033491 in words is "eleven billion, five hundred thirty-one million, thirty-three thousand, four hundred ninety-one".