2102520531 has 4 divisors (see below), whose sum is σ = 2803360712. Its totient is φ = 1401680352.

The previous prime is 2102520499. The next prime is 2102520557. The reversal of 2102520531 is 1350252012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2102520531 - 2⁵ = 2102520499 is a prime.

It is a super-2 number, since 2×2102520531² = 8841185166553043922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102520498 and 2102520507.

It is not an unprimeable number, because it can be changed into a prime (2102520571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350420086 + ... + 350420091.

It is an arithmetic number, because the mean of its divisors is an integer number (700840178).

Almost surely, 2^2102520531 is an apocalyptic number.

2102520531 is a deficient number, since it is larger than the sum of its proper divisors (700840181).

2102520531 is an equidigital number, since it uses as much as digits as its factorization.

2102520531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700840180.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2102520531 is about 45853.2499502489. The cubic root of 2102520531 is about 1281.0912997456.

Adding to 2102520531 its reverse (1350252012), we get a palindrome (3452772543).

The spelling of 2102520531 in words is "two billion, one hundred two million, five hundred twenty thousand, five hundred thirty-one".