255130821 has 12 divisors (see below), whose sum is σ = 402024480. Its totient is φ = 154624680.

The previous prime is 255130807. The next prime is 255130831. The reversal of 255130821 is 128031552.

It is a happy number.

255130821 is a `hidden beast` number, since 2 + 551 + 30 + 82 + 1 = 666.

It is not a de Polignac number, because 255130821 - 2¹⁴ = 255114437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255130801) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1288441 + ... + 1288638.

It is an arithmetic number, because the mean of its divisors is an integer number (33502040).

Almost surely, 2^255130821 is an apocalyptic number.

It is an amenable number.

255130821 is a deficient number, since it is larger than the sum of its proper divisors (146893659).

255130821 is a wasteful number, since it uses less digits than its factorization.

255130821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577096 (or 2577093 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 255130821 is about 15972.8150618481. The cubic root of 255130821 is about 634.2409936426.

The spelling of 255130821 in words is "two hundred fifty-five million, one hundred thirty thousand, eight hundred twenty-one".