2831001381 has 32 divisors (see below), whose sum is σ = 4782395520. Its totient is φ = 1639671552.

The previous prime is 2831001379. The next prime is 2831001443. The reversal of 2831001381 is 1831001382.

2831001381 is a `hidden beast` number, since 283 + 1 + 0 + 0 + 1 + 381 = 666.

It is not a de Polignac number, because 2831001381 - 2¹ = 2831001379 is a prime.

It is a super-2 number, since 2×2831001381² = 16029137638447814322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2831001361) 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 31 ways as a sum of consecutive naturals, for example, 231255 + ... + 243188.

It is an arithmetic number, because the mean of its divisors is an integer number (149449860).

Almost surely, 2^2831001381 is an apocalyptic number.

It is an amenable number.

2831001381 is a deficient number, since it is larger than the sum of its proper divisors (1951394139).

2831001381 is a wasteful number, since it uses less digits than its factorization.

2831001381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474482 (or 474476 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2831001381 is about 53207.1553552715. The cubic root of 2831001381 is about 1414.6424749853.

Subtracting from 2831001381 its reverse (1831001382), we obtain a palindrome (999999999).

It can be divided in two parts, 2831001 and 381, that added together give a palindrome (2831382).

The spelling of 2831001381 in words is "two billion, eight hundred thirty-one million, one thousand, three hundred eighty-one".