209420255 has 16 divisors (see below), whose sum is σ = 276161184. Its totient is φ = 151188480.

The previous prime is 209420249. The next prime is 209420257. The reversal of 209420255 is 552024902.

It is not a de Polignac number, because 209420255 - 2⁸ = 209419999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209420257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6362 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (17260074).

Almost surely, 2^209420255 is an apocalyptic number.

209420255 is a deficient number, since it is larger than the sum of its proper divisors (66740929).

209420255 is a wasteful number, since it uses less digits than its factorization.

209420255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27946.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 209420255 is about 14471.3598186211. The cubic root of 209420255 is about 593.8447135334.

The spelling of 209420255 in words is "two hundred nine million, four hundred twenty thousand, two hundred fifty-five".