2100135625 has 40 divisors (see below), whose sum is σ = 3041926272. Its totient is φ = 1419600000.

The previous prime is 2100135553. The next prime is 2100135629. The reversal of 2100135625 is 5265310012.

It is not a de Polignac number, because 2100135625 - 2¹³ = 2100127433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 2100135625.

It is not an unprimeable number, because it can be changed into a prime (2100135629) 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 39 ways as a sum of consecutive naturals, for example, 307245 + ... + 314005.

Almost surely, 2^2100135625 is an apocalyptic number.

2100135625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2100135625 is a deficient number, since it is larger than the sum of its proper divisors (941790647).

2100135625 is an frugal number, since it uses more digits than its factorization.

2100135625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6859 (or 6844 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2100135625 is about 45827.2367157349. The cubic root of 2100135625 is about 1280.6067324177.

Adding to 2100135625 its reverse (5265310012), we get a palindrome (7365445637).

The spelling of 2100135625 in words is "two billion, one hundred million, one hundred thirty-five thousand, six hundred twenty-five".