51245021363 has 2 divisors, whose sum is σ = 51245021364. Its totient is φ = 51245021362.

The previous prime is 51245021351. The next prime is 51245021383. The reversal of 51245021363 is 36312054215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51245021363 - 2⁶ = 51245021299 is a prime.

It is not a weakly prime, because it can be changed into another prime (51245021383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622510681 + 25622510682.

It is an arithmetic number, because the mean of its divisors is an integer number (25622510682).

Almost surely, 2^51245021363 is an apocalyptic number.

51245021363 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245021363 is an equidigital number, since it uses as much as digits as its factorization.

51245021363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 51245021363 its reverse (36312054215), we get a palindrome (87557075578).

The spelling of 51245021363 in words is "fifty-one billion, two hundred forty-five million, twenty-one thousand, three hundred sixty-three".