342147515521 has 4 divisors (see below), whose sum is σ = 391025732032. Its totient is φ = 293269299012.

The previous prime is 342147515483. The next prime is 342147515527. The reversal of 342147515521 is 125515741243.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 342147515521 - 2⁹ = 342147515009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342147515527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24439108245 + ... + 24439108258.

It is an arithmetic number, because the mean of its divisors is an integer number (97756433008).

Almost surely, 2^342147515521 is an apocalyptic number.

It is an amenable number.

342147515521 is a deficient number, since it is larger than the sum of its proper divisors (48878216511).

342147515521 is an equidigital number, since it uses as much as digits as its factorization.

342147515521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48878216510.

The product of its digits is 168000, while the sum is 40.

The spelling of 342147515521 in words is "three hundred forty-two billion, one hundred forty-seven million, five hundred fifteen thousand, five hundred twenty-one".