2100551655 has 16 divisors (see below), whose sum is σ = 3361895424. Its totient is φ = 1119956640.

The previous prime is 2100551611. The next prime is 2100551699. The reversal of 2100551655 is 5561550012.

It is an interprime number because it is at equal distance from previous prime (2100551611) and next prime (2100551699).

It is not a de Polignac number, because 2100551655 - 2⁹ = 2100551143 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35182 + ... + 73748.

It is an arithmetic number, because the mean of its divisors is an integer number (210118464).

Almost surely, 2^2100551655 is an apocalyptic number.

2100551655 is a deficient number, since it is larger than the sum of its proper divisors (1261343769).

2100551655 is a wasteful number, since it uses less digits than its factorization.

2100551655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42206.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 2100551655 is about 45831.7756038319. The cubic root of 2100551655 is about 1280.6912881700.

The spelling of 2100551655 in words is "two billion, one hundred million, five hundred fifty-one thousand, six hundred fifty-five".