34206216521 has 4 divisors (see below), whose sum is σ = 34207338000. Its totient is φ = 34205095044.

The previous prime is 34206216493. The next prime is 34206216523. The reversal of 34206216521 is 12561260243.

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 34206216521 - 2³⁴ = 17026347337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34206216523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513671 + ... + 576428.

It is an arithmetic number, because the mean of its divisors is an integer number (8551834500).

Almost surely, 2^34206216521 is an apocalyptic number.

It is an amenable number.

34206216521 is a deficient number, since it is larger than the sum of its proper divisors (1121479).

34206216521 is a wasteful number, since it uses less digits than its factorization.

34206216521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121478.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 34206216521 its reverse (12561260243), we get a palindrome (46767476764).

The spelling of 34206216521 in words is "thirty-four billion, two hundred six million, two hundred sixteen thousand, five hundred twenty-one".