2101752655 has 4 divisors (see below), whose sum is σ = 2522103192. Its totient is φ = 1681402120.

The previous prime is 2101752637. The next prime is 2101752661. The reversal of 2101752655 is 5562571012.

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

It is a de Polignac number, because none of the positive numbers 2^k-2101752655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101752655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210175261 + ... + 210175270.

It is an arithmetic number, because the mean of its divisors is an integer number (630525798).

Almost surely, 2^2101752655 is an apocalyptic number.

2101752655 is a deficient number, since it is larger than the sum of its proper divisors (420350537).

2101752655 is an equidigital number, since it uses as much as digits as its factorization.

2101752655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420350536.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 2101752655 is about 45844.8759950335. The cubic root of 2101752655 is about 1280.9353220306.

The spelling of 2101752655 in words is "two billion, one hundred one million, seven hundred fifty-two thousand, six hundred fifty-five".