2051938381 has 2 divisors, whose sum is σ = 2051938382. Its totient is φ = 2051938380.

The previous prime is 2051938373. The next prime is 2051938429. The reversal of 2051938381 is 1838391502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1925015625 + 126922756 = 43875^2 + 11266^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051938381 - 2³ = 2051938373 is a prime.

It is a super-2 number, since 2×2051938381² = 8420902238841802322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051938351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025969190 + 1025969191.

It is an arithmetic number, because the mean of its divisors is an integer number (1025969191).

Almost surely, 2^2051938381 is an apocalyptic number.

It is an amenable number.

2051938381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051938381 is an equidigital number, since it uses as much as digits as its factorization.

2051938381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2051938381 is about 45298.3264701909. The cubic root of 2051938381 is about 1270.7343554994.

The spelling of 2051938381 in words is "two billion, fifty-one million, nine hundred thirty-eight thousand, three hundred eighty-one".