2108621025 has 96 divisors (see below), whose sum is σ = 4619704320. Its totient is φ = 921983040.

The previous prime is 2108620981. The next prime is 2108621029. The reversal of 2108621025 is 5201268012.

It is a happy number.

2108621025 is a `hidden beast` number, since 2 + 10 + 8 + 621 + 0 + 25 = 666.

It is not a de Polignac number, because 2108621025 - 2¹⁹ = 2108096737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2108621025.

It is not an unprimeable number, because it can be changed into a prime (2108621029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 98974 + ... + 118376.

It is an arithmetic number, because the mean of its divisors is an integer number (48121920).

Almost surely, 2^2108621025 is an apocalyptic number.

2108621025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2108621025 is an abundant number, since it is smaller than the sum of its proper divisors (2511083295).

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

2108621025 is a wasteful number, since it uses less digits than its factorization.

2108621025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19452 (or 19441 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2108621025 is about 45919.7237034371. The cubic root of 2108621025 is about 1282.3291383473.

Adding to 2108621025 its reverse (5201268012), we get a palindrome (7309889037).

The spelling of 2108621025 in words is "two billion, one hundred eight million, six hundred twenty-one thousand, twenty-five".