11531013501 has 8 divisors (see below), whose sum is σ = 17571068224. Its totient is φ = 6589150560.

The previous prime is 11531013457. The next prime is 11531013509. The reversal of 11531013501 is 10531013511.

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

It is not a de Polignac number, because 11531013501 - 2¹³ = 11531005309 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: 549095881 = 11531013501 / (1 + 1 + 5 + 3 + 1 + 0 + 1 + 3 + 5 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531013509) 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, 274547920 + ... + 274547961.

It is an arithmetic number, because the mean of its divisors is an integer number (2196383528).

Almost surely, 2^11531013501 is an apocalyptic number.

It is an amenable number.

11531013501 is a deficient number, since it is larger than the sum of its proper divisors (6040054723).

11531013501 is an equidigital number, since it uses as much as digits as its factorization.

11531013501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549095891.

The product of its (nonzero) digits is 225, while the sum is 21.

The spelling of 11531013501 in words is "eleven billion, five hundred thirty-one million, thirteen thousand, five hundred one".