345163571521 has 2 divisors, whose sum is σ = 345163571522. Its totient is φ = 345163571520.

The previous prime is 345163571453. The next prime is 345163571563. The reversal of 345163571521 is 125175361543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344475086400 + 688485121 = 586920^2 + 26239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345163571521 is a prime.

It is a super-2 number, since 2×345163571521² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345163971521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172581785760 + 172581785761.

It is an arithmetic number, because the mean of its divisors is an integer number (172581785761).

Almost surely, 2^345163571521 is an apocalyptic number.

It is an amenable number.

345163571521 is a deficient number, since it is larger than the sum of its proper divisors (1).

345163571521 is an equidigital number, since it uses as much as digits as its factorization.

345163571521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 43.

The spelling of 345163571521 in words is "three hundred forty-five billion, one hundred sixty-three million, five hundred seventy-one thousand, five hundred twenty-one".