4051631281 has 2 divisors, whose sum is σ = 4051631282. Its totient is φ = 4051631280.

The previous prime is 4051631251. The next prime is 4051631293. The reversal of 4051631281 is 1821361504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2624000625 + 1427630656 = 51225^2 + 37784^2 .

It is a cyclic number.

It is not a de Polignac number, because 4051631281 - 2⁷ = 4051631153 is a prime.

It is a super-2 number, since 2×4051631281² = 32831432074355401922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4051631201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2025815640 + 2025815641.

It is an arithmetic number, because the mean of its divisors is an integer number (2025815641).

Almost surely, 2^4051631281 is an apocalyptic number.

It is an amenable number.

4051631281 is a deficient number, since it is larger than the sum of its proper divisors (1).

4051631281 is an equidigital number, since it uses as much as digits as its factorization.

4051631281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 4051631281 is about 63652.4255704368. The cubic root of 4051631281 is about 1594.2018367422.

Adding to 4051631281 its reverse (1821361504), we get a palindrome (5872992785).

The spelling of 4051631281 in words is "four billion, fifty-one million, six hundred thirty-one thousand, two hundred eighty-one".