342521354521 has 2 divisors, whose sum is σ = 342521354522. Its totient is φ = 342521354520.

The previous prime is 342521354501. The next prime is 342521354537. The reversal of 342521354521 is 125453125243.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182192385600 + 160328968921 = 426840^2 + 400411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342521354521 is a prime.

It is not a weakly prime, because it can be changed into another prime (342521354501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171260677260 + 171260677261.

It is an arithmetic number, because the mean of its divisors is an integer number (171260677261).

Almost surely, 2^342521354521 is an apocalyptic number.

It is an amenable number.

342521354521 is a deficient number, since it is larger than the sum of its proper divisors (1).

342521354521 is an equidigital number, since it uses as much as digits as its factorization.

342521354521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 37.

Adding to 342521354521 its reverse (125453125243), we get a palindrome (467974479764).

The spelling of 342521354521 in words is "three hundred forty-two billion, five hundred twenty-one million, three hundred fifty-four thousand, five hundred twenty-one".