34731221 has 16 divisors (see below), whose sum is σ = 44242560. Its totient is φ = 26542080.

The previous prime is 34731199. The next prime is 34731239. The reversal of 34731221 is 12213743.

34731221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34731221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34731251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5420 + ... + 9941.

It is an arithmetic number, because the mean of its divisors is an integer number (2765160).

Almost surely, 2^34731221 is an apocalyptic number.

It is an amenable number.

34731221 is a deficient number, since it is larger than the sum of its proper divisors (9511339).

34731221 is a wasteful number, since it uses less digits than its factorization.

34731221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15404.

The product of its digits is 1008, while the sum is 23.

The square root of 34731221 is about 5893.3200320363. The cubic root of 34731221 is about 326.2671508822.

Adding to 34731221 its reverse (12213743), we get a palindrome (46944964).

The spelling of 34731221 in words is "thirty-four million, seven hundred thirty-one thousand, two hundred twenty-one".