2102531513 has 4 divisors (see below), whose sum is σ = 2102737488. Its totient is φ = 2102325540.

The previous prime is 2102531479. The next prime is 2102531521. The reversal of 2102531513 is 3151352012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2102531513 - 2¹⁰ = 2102530489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102531573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86831 + ... + 108372.

It is an arithmetic number, because the mean of its divisors is an integer number (525684372).

Almost surely, 2^2102531513 is an apocalyptic number.

It is an amenable number.

2102531513 is a deficient number, since it is larger than the sum of its proper divisors (205975).

2102531513 is a wasteful number, since it uses less digits than its factorization.

2102531513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205974.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2102531513 is about 45853.3697016915. The cubic root of 2102531513 is about 1281.0935302304.

Adding to 2102531513 its reverse (3151352012), we get a palindrome (5253883525).

The spelling of 2102531513 in words is "two billion, one hundred two million, five hundred thirty-one thousand, five hundred thirteen".