202120255 has 4 divisors (see below), whose sum is σ = 242544312. Its totient is φ = 161696200.

The previous prime is 202120249. The next prime is 202120273. The reversal of 202120255 is 552021202.

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

It is not a de Polignac number, because 202120255 - 2¹⁹ = 201595967 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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, 20212021 + ... + 20212030.

It is an arithmetic number, because the mean of its divisors is an integer number (60636078).

Almost surely, 2^202120255 is an apocalyptic number.

202120255 is a deficient number, since it is larger than the sum of its proper divisors (40424057).

202120255 is an equidigital number, since it uses as much as digits as its factorization.

202120255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40424056.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 202120255 is about 14216.9003302408. The cubic root of 202120255 is about 586.8628420569.

Adding to 202120255 its reverse (552021202), we get a palindrome (754141457).

The spelling of 202120255 in words is "two hundred two million, one hundred twenty thousand, two hundred fifty-five".