51520071523 has 2 divisors, whose sum is σ = 51520071524. Its totient is φ = 51520071522.

The previous prime is 51520071467. The next prime is 51520071529. The reversal of 51520071523 is 32517002515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51520071523 - 2⁹ = 51520071011 is a prime.

It is not a weakly prime, because it can be changed into another prime (51520071529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760035761 + 25760035762.

It is an arithmetic number, because the mean of its divisors is an integer number (25760035762).

Almost surely, 2^51520071523 is an apocalyptic number.

51520071523 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520071523 is an equidigital number, since it uses as much as digits as its factorization.

51520071523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 51520071523 in words is "fifty-one billion, five hundred twenty million, seventy-one thousand, five hundred twenty-three".