51398217522037 has 2 divisors, whose sum is σ = 51398217522038. Its totient is φ = 51398217522036.

The previous prime is 51398217522013. The next prime is 51398217522059. The reversal of 51398217522037 is 73022571289315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47406956743441 + 3991260778596 = 6885271^2 + 1997814^2 .

It is a cyclic number.

It is not a de Polignac number, because 51398217522037 - 2³⁵ = 51363857783669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51398217522137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25699108761018 + 25699108761019.

It is an arithmetic number, because the mean of its divisors is an integer number (25699108761019).

Almost surely, 2^{51398217522037} is an apocalyptic number.

It is an amenable number.

51398217522037 is a deficient number, since it is larger than the sum of its proper divisors (1).

51398217522037 is an equidigital number, since it uses as much as digits as its factorization.

51398217522037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 51398217522037 in words is "fifty-one trillion, three hundred ninety-eight billion, two hundred seventeen million, five hundred twenty-two thousand, thirty-seven".