51520453573 has 2 divisors, whose sum is σ = 51520453574. Its totient is φ = 51520453572.

The previous prime is 51520453559. The next prime is 51520453591. The reversal of 51520453573 is 37535402515.

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., 50219913604 + 1300539969 = 224098^2 + 36063^2 .

It is a cyclic number.

It is not a de Polignac number, because 51520453573 - 2¹⁷ = 51520322501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51520423573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760226786 + 25760226787.

It is an arithmetic number, because the mean of its divisors is an integer number (25760226787).

Almost surely, 2^51520453573 is an apocalyptic number.

It is an amenable number.

51520453573 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520453573 is an equidigital number, since it uses as much as digits as its factorization.

51520453573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315000, while the sum is 40.

The spelling of 51520453573 in words is "fifty-one billion, five hundred twenty million, four hundred fifty-three thousand, five hundred seventy-three".