34431221 has 4 divisors (see below), whose sum is σ = 37561344. Its totient is φ = 31301100.

The previous prime is 34431181. The next prime is 34431227. The reversal of 34431221 is 12213443.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12213443 = 11 ⋅1110313.

It is a cyclic number.

It is not a de Polignac number, because 34431221 - 2¹⁰ = 34430197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34431193 and 34431202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34431227) 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, 1565045 + ... + 1565066.

It is an arithmetic number, because the mean of its divisors is an integer number (9390336).

Almost surely, 2^34431221 is an apocalyptic number.

It is an amenable number.

34431221 is a deficient number, since it is larger than the sum of its proper divisors (3130123).

34431221 is a wasteful number, since it uses less digits than its factorization.

34431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130122.

The product of its digits is 576, while the sum is 20.

The square root of 34431221 is about 5867.8122839777. The cubic root of 34431221 is about 325.3250271057.

Adding to 34431221 its reverse (12213443), we get a palindrome (46644664).

It can be divided in two parts, 3443 and 1221, that added together give a palindrome (4664).

The spelling of 34431221 in words is "thirty-four million, four hundred thirty-one thousand, two hundred twenty-one".