102555851 has 4 divisors (see below), whose sum is σ = 103185192. Its totient is φ = 101926512.

The previous prime is 102555847. The next prime is 102555853. The reversal of 102555851 is 158555201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158555201 = 7 ⋅22650743.

It is a cyclic number.

It is not a de Polignac number, because 102555851 - 2² = 102555847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102555853) 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 in 3 ways as a sum of consecutive naturals, for example, 314426 + ... + 314751.

It is an arithmetic number, because the mean of its divisors is an integer number (25796298).

Almost surely, 2^102555851 is an apocalyptic number.

102555851 is a deficient number, since it is larger than the sum of its proper divisors (629341).

102555851 is an equidigital number, since it uses as much as digits as its factorization.

102555851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629340.

The product of its (nonzero) digits is 10000, while the sum is 32.

The square root of 102555851 is about 10126.9862743069. The cubic root of 102555851 is about 468.0800673271.

The spelling of 102555851 in words is "one hundred two million, five hundred fifty-five thousand, eight hundred fifty-one".