51331425401 has 2 divisors, whose sum is σ = 51331425402. Its totient is φ = 51331425400.

The previous prime is 51331425391. The next prime is 51331425427. The reversal of 51331425401 is 10452413315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25819669225 + 25511756176 = 160685^2 + 159724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51331425401 is a prime.

It is not a weakly prime, because it can be changed into another prime (51331445401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25665712700 + 25665712701.

It is an arithmetic number, because the mean of its divisors is an integer number (25665712701).

Almost surely, 2^51331425401 is an apocalyptic number.

It is an amenable number.

51331425401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51331425401 is an equidigital number, since it uses as much as digits as its factorization.

51331425401 is an evil number, because the sum of its binary digits is even.

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

Adding to 51331425401 its reverse (10452413315), we get a palindrome (61783838716).

The spelling of 51331425401 in words is "fifty-one billion, three hundred thirty-one million, four hundred twenty-five thousand, four hundred one".