51998245451 has 2 divisors, whose sum is σ = 51998245452. Its totient is φ = 51998245450.

The previous prime is 51998245399. The next prime is 51998245471. The reversal of 51998245451 is 15454289915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51998245451 - 2¹⁰ = 51998244427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51998245393 and 51998245402.

It is not a weakly prime, because it can be changed into another prime (51998245471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25999122725 + 25999122726.

It is an arithmetic number, because the mean of its divisors is an integer number (25999122726).

Almost surely, 2^51998245451 is an apocalyptic number.

51998245451 is a deficient number, since it is larger than the sum of its proper divisors (1).

51998245451 is an equidigital number, since it uses as much as digits as its factorization.

51998245451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592000, while the sum is 53.

The spelling of 51998245451 in words is "fifty-one billion, nine hundred ninety-eight million, two hundred forty-five thousand, four hundred fifty-one".