255520212 has 12 divisors (see below), whose sum is σ = 596213856. Its totient is φ = 85173400.

The previous prime is 255520211. The next prime is 255520219. The reversal of 255520212 is 212025552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255520211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10646664 + ... + 10646687.

It is an arithmetic number, because the mean of its divisors is an integer number (49684488).

Almost surely, 2^255520212 is an apocalyptic number.

It is an amenable number.

255520212 is an abundant number, since it is smaller than the sum of its proper divisors (340693644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255520212 is a wasteful number, since it uses less digits than its factorization.

255520212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21293358 (or 21293356 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 255520212 is about 15984.9995933688. Note that the first 3 decimals coincide. The cubic root of 255520212 is about 634.5634977291.

Adding to 255520212 its reverse (212025552), we get a palindrome (467545764).

The spelling of 255520212 in words is "two hundred fifty-five million, five hundred twenty thousand, two hundred twelve".