523221657851 has 2 divisors, whose sum is σ = 523221657852. Its totient is φ = 523221657850.

The previous prime is 523221657811. The next prime is 523221657961. The reversal of 523221657851 is 158756122325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 523221657851 - 2¹⁰ = 523221656827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 523221657796 and 523221657805.

It is not a weakly prime, because it can be changed into another prime (523221657811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261610828925 + 261610828926.

It is an arithmetic number, because the mean of its divisors is an integer number (261610828926).

Almost surely, 2^523221657851 is an apocalyptic number.

523221657851 is a deficient number, since it is larger than the sum of its proper divisors (1).

523221657851 is an equidigital number, since it uses as much as digits as its factorization.

523221657851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 47.

The spelling of 523221657851 in words is "five hundred twenty-three billion, two hundred twenty-one million, six hundred fifty-seven thousand, eight hundred fifty-one".