2155565102 has 4 divisors (see below), whose sum is σ = 3233347656. Its totient is φ = 1077782550.

The previous prime is 2155565101. The next prime is 2155565107. The reversal of 2155565102 is 2015655512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155565101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538891274 + ... + 538891277.

It is an arithmetic number, because the mean of its divisors is an integer number (808336914).

Almost surely, 2^2155565102 is an apocalyptic number.

2155565102 is a deficient number, since it is larger than the sum of its proper divisors (1077782554).

2155565102 is a wasteful number, since it uses less digits than its factorization.

2155565102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077782553.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 2155565102 is about 46428.0637330484. The cubic root of 2155565102 is about 1291.7755135764.

The spelling of 2155565102 in words is "two billion, one hundred fifty-five million, five hundred sixty-five thousand, one hundred two".