51730998533 has 2 divisors, whose sum is σ = 51730998534. Its totient is φ = 51730998532.

The previous prime is 51730998503. The next prime is 51730998547. The reversal of 51730998533 is 33589903715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50193025444 + 1537973089 = 224038^2 + 39217^2 .

It is a cyclic number.

It is not a de Polignac number, because 51730998533 - 2¹⁶ = 51730932997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51730998503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25865499266 + 25865499267.

It is an arithmetic number, because the mean of its divisors is an integer number (25865499267).

Almost surely, 2^51730998533 is an apocalyptic number.

It is an amenable number.

51730998533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51730998533 is an equidigital number, since it uses as much as digits as its factorization.

51730998533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 51730998533 in words is "fifty-one billion, seven hundred thirty million, nine hundred ninety-eight thousand, five hundred thirty-three".