2055720381 has 64 divisors (see below), whose sum is σ = 3424425984. Its totient is φ = 1079020800.

The previous prime is 2055720343. The next prime is 2055720437. The reversal of 2055720381 is 1830275502.

It is not a de Polignac number, because 2055720381 - 2⁷ = 2055720253 is a prime.

It is a super-2 number, since 2×2055720381² = 8451972569717570322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055720281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 520986 + ... + 524916.

It is an arithmetic number, because the mean of its divisors is an integer number (53506656).

Almost surely, 2^2055720381 is an apocalyptic number.

It is an amenable number.

2055720381 is a deficient number, since it is larger than the sum of its proper divisors (1368705603).

2055720381 is a wasteful number, since it uses less digits than its factorization.

2055720381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 2055720381 is about 45340.0527238335. The cubic root of 2055720381 is about 1271.5145881069.

Adding to 2055720381 its reverse (1830275502), we get a palindrome (3885995883).

The spelling of 2055720381 in words is "two billion, fifty-five million, seven hundred twenty thousand, three hundred eighty-one".