51154172401 has 2 divisors, whose sum is σ = 51154172402. Its totient is φ = 51154172400.

The previous prime is 51154172369. The next prime is 51154172471. The reversal of 51154172401 is 10427145115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38783394225 + 12370778176 = 196935^2 + 111224^2 .

It is a cyclic number.

It is not a de Polignac number, because 51154172401 - 2⁵ = 51154172369 is a prime.

It is not a weakly prime, because it can be changed into another prime (51154172471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577086200 + 25577086201.

It is an arithmetic number, because the mean of its divisors is an integer number (25577086201).

Almost surely, 2^51154172401 is an apocalyptic number.

It is an amenable number.

51154172401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51154172401 is an equidigital number, since it uses as much as digits as its factorization.

51154172401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The spelling of 51154172401 in words is "fifty-one billion, one hundred fifty-four million, one hundred seventy-two thousand, four hundred one".