102254155 has 4 divisors (see below), whose sum is σ = 122704992. Its totient is φ = 81803320.

The previous prime is 102254111. The next prime is 102254161. The reversal of 102254155 is 551452201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551452201 = 379 ⋅1455019.

It is not a de Polignac number, because 102254155 - 2⁹ = 102253643 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10225411 + ... + 10225420.

It is an arithmetic number, because the mean of its divisors is an integer number (30676248).

Almost surely, 2^102254155 is an apocalyptic number.

102254155 is a deficient number, since it is larger than the sum of its proper divisors (20450837).

102254155 is an equidigital number, since it uses as much as digits as its factorization.

102254155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20450836.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 102254155 is about 10112.0796575185. The cubic root of 102254155 is about 467.6206214533.

The spelling of 102254155 in words is "one hundred two million, two hundred fifty-four thousand, one hundred fifty-five".