2040451381 has 2 divisors, whose sum is σ = 2040451382. Its totient is φ = 2040451380.

The previous prime is 2040451331. The next prime is 2040451393. The reversal of 2040451381 is 1831540402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1386370756 + 654080625 = 37234^2 + 25575^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040451381 - 2⁷ = 2040451253 is a prime.

It is a super-2 number, since 2×2040451381² = 8326883676449614322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040451331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020225690 + 1020225691.

It is an arithmetic number, because the mean of its divisors is an integer number (1020225691).

Almost surely, 2^2040451381 is an apocalyptic number.

It is an amenable number.

2040451381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040451381 is an equidigital number, since it uses as much as digits as its factorization.

2040451381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2040451381 is about 45171.3557578251. The cubic root of 2040451381 is about 1268.3586751571.

Adding to 2040451381 its reverse (1831540402), we get a palindrome (3871991783).

The spelling of 2040451381 in words is "two billion, forty million, four hundred fifty-one thousand, three hundred eighty-one".