2101253500 has 48 divisors (see below), whose sum is σ = 4593712032. Its totient is φ = 839664000.

The previous prime is 2101253477. The next prime is 2101253503. The reversal of 2101253500 is 53521012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101253503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832240 + ... + 834760.

It is an arithmetic number, because the mean of its divisors is an integer number (95702334).

Almost surely, 2^2101253500 is an apocalyptic number.

2101253500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101253500 is an abundant number, since it is smaller than the sum of its proper divisors (2492458532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101253500 is a wasteful number, since it uses less digits than its factorization.

2101253500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2101253500 is about 45839.4317155001. The cubic root of 2101253500 is about 1280.8339089088.

Adding to 2101253500 its reverse (53521012), we get a palindrome (2154774512).

The spelling of 2101253500 in words is "two billion, one hundred one million, two hundred fifty-three thousand, five hundred".