102043555 has 4 divisors (see below), whose sum is σ = 122452272. Its totient is φ = 81634840.

The previous prime is 102043549. The next prime is 102043559. The reversal of 102043555 is 555340201.

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

It is not a de Polignac number, because 102043555 - 2⁵ = 102043523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102043559) 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, 10204351 + ... + 10204360.

It is an arithmetic number, because the mean of its divisors is an integer number (30613068).

Almost surely, 2^102043555 is an apocalyptic number.

102043555 is a deficient number, since it is larger than the sum of its proper divisors (20408717).

102043555 is an equidigital number, since it uses as much as digits as its factorization.

102043555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20408716.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 102043555 is about 10101.6610020333. The cubic root of 102043555 is about 467.2993677109.

Adding to 102043555 its reverse (555340201), we get a palindrome (657383756).

The spelling of 102043555 in words is "one hundred two million, forty-three thousand, five hundred fifty-five".