51320005601 has 2 divisors, whose sum is σ = 51320005602. Its totient is φ = 51320005600.

The previous prime is 51320005579. The next prime is 51320005609. The reversal of 51320005601 is 10650002315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45369426001 + 5950579600 = 213001^2 + 77140^2 .

It is a cyclic number.

It is not a de Polignac number, because 51320005601 - 2²² = 51315811297 is a prime.

It is not a weakly prime, because it can be changed into another prime (51320005609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25660002800 + 25660002801.

It is an arithmetic number, because the mean of its divisors is an integer number (25660002801).

Almost surely, 2^51320005601 is an apocalyptic number.

It is an amenable number.

51320005601 is a deficient number, since it is larger than the sum of its proper divisors (1).

51320005601 is an equidigital number, since it uses as much as digits as its factorization.

51320005601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 51320005601 its reverse (10650002315), we get a palindrome (61970007916).

The spelling of 51320005601 in words is "fifty-one billion, three hundred twenty million, five thousand, six hundred one".