2131523 has 8 divisors (see below), whose sum is σ = 2197776. Its totient is φ = 2066400.

The previous prime is 2131517. The next prime is 2131531. The reversal of 2131523 is 3251312.

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 2131523 - 2⁸ = 2131267 is a prime.

It is a d-powerful number, because it can be written as 2³ + 1 + 3⁶ + 1 + 5⁹ + 2⁹ + 3¹¹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4853 + ... + 5273.

It is an arithmetic number, because the mean of its divisors is an integer number (274722).

2^2131523 is an apocalyptic number.

2131523 is a deficient number, since it is larger than the sum of its proper divisors (66253).

2131523 is an equidigital number, since it uses as much as digits as its factorization.

2131523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565.

The product of its digits is 180, while the sum is 17.

The square root of 2131523 is about 1459.9736298988. The cubic root of 2131523 is about 128.6954939421.

Adding to 2131523 its reverse (3251312), we get a palindrome (5382835).

The spelling of 2131523 in words is "two million, one hundred thirty-one thousand, five hundred twenty-three".