11531541 has 8 divisors (see below), whose sum is σ = 17571904. Its totient is φ = 6589440.

The previous prime is 11531539. The next prime is 11531543. The reversal of 11531541 is 14513511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11531539) and next prime (11531543).

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

It is not a de Polignac number, because 11531541 - 2¹ = 11531539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 549121 = 11531541 / (1 + 1 + 5 + 3 + 1 + 5 + 4 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531543) 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, 274540 + ... + 274581.

It is an arithmetic number, because the mean of its divisors is an integer number (2196488).

Almost surely, 2^11531541 is an apocalyptic number.

It is an amenable number.

11531541 is a deficient number, since it is larger than the sum of its proper divisors (6040363).

11531541 is an equidigital number, since it uses as much as digits as its factorization.

11531541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549131.

The product of its digits is 300, while the sum is 21.

The square root of 11531541 is about 3395.8122739633. The cubic root of 11531541 is about 225.9240418763.

The spelling of 11531541 in words is "eleven million, five hundred thirty-one thousand, five hundred forty-one".