2105531225 has 48 divisors (see below), whose sum is σ = 3150096000. Its totient is φ = 1393842240.

The previous prime is 2105531221. The next prime is 2105531237. The reversal of 2105531225 is 5221355012.

It is not a de Polignac number, because 2105531225 - 2² = 2105531221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105531194 and 2105531203.

It is not an unprimeable number, because it can be changed into a prime (2105531221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 244442 + ... + 252908.

It is an arithmetic number, because the mean of its divisors is an integer number (65627000).

Almost surely, 2^2105531225 is an apocalyptic number.

2105531225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2105531225 is a deficient number, since it is larger than the sum of its proper divisors (1044564775).

2105531225 is an equidigital number, since it uses as much as digits as its factorization.

2105531225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527 (or 8508 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2105531225 is about 45886.0678746828. The cubic root of 2105531225 is about 1281.7024922491.

Adding to 2105531225 its reverse (5221355012), we get a palindrome (7326886237).

The spelling of 2105531225 in words is "two billion, one hundred five million, five hundred thirty-one thousand, two hundred twenty-five".