34155221 has 4 divisors (see below), whose sum is σ = 34252332. Its totient is φ = 34058112.

The previous prime is 34155151. The next prime is 34155223. The reversal of 34155221 is 12255143.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27447121 + 6708100 = 5239^2 + 2590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34155221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34155223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48026 + ... + 48731.

It is an arithmetic number, because the mean of its divisors is an integer number (8563083).

Almost surely, 2^34155221 is an apocalyptic number.

It is an amenable number.

34155221 is a deficient number, since it is larger than the sum of its proper divisors (97111).

34155221 is an equidigital number, since it uses as much as digits as its factorization.

34155221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97110.

The product of its digits is 1200, while the sum is 23.

The square root of 34155221 is about 5844.2468291474. The cubic root of 34155221 is about 324.4534276623.

The spelling of 34155221 in words is "thirty-four million, one hundred fifty-five thousand, two hundred twenty-one".