5251210381 has 2 divisors, whose sum is σ = 5251210382. Its totient is φ = 5251210380.

The previous prime is 5251210379. The next prime is 5251210399. The reversal of 5251210381 is 1830121525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3132081225 + 2119129156 = 55965^2 + 46034^2 .

It is a cyclic number.

It is not a de Polignac number, because 5251210381 - 2¹ = 5251210379 is a prime.

It is a super-2 number, since 2×5251210381² = 55150420931044330322, which contains 22 as substring.

Together with 5251210379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5251210301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625605190 + 2625605191.

It is an arithmetic number, because the mean of its divisors is an integer number (2625605191).

Almost surely, 2^5251210381 is an apocalyptic number.

It is an amenable number.

5251210381 is a deficient number, since it is larger than the sum of its proper divisors (1).

5251210381 is an equidigital number, since it uses as much as digits as its factorization.

5251210381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 5251210381 is about 72465.2356720103. The cubic root of 5251210381 is about 1738.1468777866.

The spelling of 5251210381 in words is "five billion, two hundred fifty-one million, two hundred ten thousand, three hundred eighty-one".