255129820 has 48 divisors (see below), whose sum is σ = 604648800. Its totient is φ = 89573120.

The previous prime is 255129773. The next prime is 255129841. The reversal of 255129820 is 28921552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13615 + ... + 26374.

It is an arithmetic number, because the mean of its divisors is an integer number (12596850).

Almost surely, 2^255129820 is an apocalyptic number.

255129820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255129820 is an abundant number, since it is smaller than the sum of its proper divisors (349518980).

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

255129820 is a wasteful number, since it uses less digits than its factorization.

255129820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40038 (or 40036 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 255129820 is about 15972.7837273282. The cubic root of 255129820 is about 634.2401641648.

The spelling of 255129820 in words is "two hundred fifty-five million, one hundred twenty-nine thousand, eight hundred twenty".