5031256421 has 2 divisors, whose sum is σ = 5031256422. Its totient is φ = 5031256420.

The previous prime is 5031256397. The next prime is 5031256427. The reversal of 5031256421 is 1246521305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4584779521 + 446476900 = 67711^2 + 21130^2 .

It is a cyclic number.

It is not a de Polignac number, because 5031256421 - 2⁶ = 5031256357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5031256427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515628210 + 2515628211.

It is an arithmetic number, because the mean of its divisors is an integer number (2515628211).

Almost surely, 2^5031256421 is an apocalyptic number.

It is an amenable number.

5031256421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5031256421 is an equidigital number, since it uses as much as digits as its factorization.

5031256421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 5031256421 is about 70931.3500576438. The cubic root of 5031256421 is about 1713.5317294074.

Adding to 5031256421 its reverse (1246521305), we get a palindrome (6277777726).

The spelling of 5031256421 in words is "five billion, thirty-one million, two hundred fifty-six thousand, four hundred twenty-one".