255117020 has 12 divisors (see below), whose sum is σ = 535745784. Its totient is φ = 102046800.

The previous prime is 255117013. The next prime is 255117029. The reversal of 255117020 is 20711552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255117029) 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, 6377906 + ... + 6377945.

It is an arithmetic number, because the mean of its divisors is an integer number (44645482).

Almost surely, 2^255117020 is an apocalyptic number.

255117020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255117020 is an abundant number, since it is smaller than the sum of its proper divisors (280628764).

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

255117020 is a wasteful number, since it uses less digits than its factorization.

255117020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12755860 (or 12755858 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 255117020 is about 15972.3830407363. The cubic root of 255117020 is about 634.2295572642.

Adding to 255117020 its reverse (20711552), we get a palindrome (275828572).

The spelling of 255117020 in words is "two hundred fifty-five million, one hundred seventeen thousand, twenty".