2055081381 has 4 divisors (see below), whose sum is σ = 2740108512. Its totient is φ = 1370054252.

The previous prime is 2055081377. The next prime is 2055081403. The reversal of 2055081381 is 1831805502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2055081381 - 2² = 2055081377 is a prime.

It is a super-2 number, since 2×2055081381² = 8446718965065734322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055081331) 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, 342513561 + ... + 342513566.

It is an arithmetic number, because the mean of its divisors is an integer number (685027128).

Almost surely, 2^2055081381 is an apocalyptic number.

It is an amenable number.

2055081381 is a deficient number, since it is larger than the sum of its proper divisors (685027131).

2055081381 is an equidigital number, since it uses as much as digits as its factorization.

2055081381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685027130.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 2055081381 is about 45333.0054265102. The cubic root of 2055081381 is about 1271.3828286144.

Adding to 2055081381 its reverse (1831805502), we get a palindrome (3886886883).

The spelling of 2055081381 in words is "two billion, fifty-five million, eighty-one thousand, three hundred eighty-one".