255813333381 has 24 divisors (see below), whose sum is σ = 386987668704. Its totient is φ = 168853669200.

The previous prime is 255813333379. The next prime is 255813333401. The reversal of 255813333381 is 183333318552.

255813333381 is a `hidden beast` number, since 2 + 5 + 581 + 3 + 3 + 33 + 38 + 1 = 666.

It is not a de Polignac number, because 255813333381 - 2¹ = 255813333379 is a prime.

It is a super-2 number, since 2×255813333381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255813333311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5186991 + ... + 5236076.

It is an arithmetic number, because the mean of its divisors is an integer number (16124486196).

Almost surely, 2^255813333381 is an apocalyptic number.

It is an amenable number.

255813333381 is a deficient number, since it is larger than the sum of its proper divisors (131174335323).

255813333381 is a wasteful number, since it uses less digits than its factorization.

255813333381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10423183 (or 10423171 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 255813333381 in words is "two hundred fifty-five billion, eight hundred thirteen million, three hundred thirty-three thousand, three hundred eighty-one".