34031221 has 4 divisors (see below), whose sum is σ = 38892832. Its totient is φ = 29169612.

The previous prime is 34031219. The next prime is 34031227. The reversal of 34031221 is 12213043.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12213043 = 1187 ⋅10289.

It is a cyclic number.

It is not a de Polignac number, because 34031221 - 2¹ = 34031219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34031195 and 34031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34031227) 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, 2430795 + ... + 2430808.

It is an arithmetic number, because the mean of its divisors is an integer number (9723208).

Almost surely, 2^34031221 is an apocalyptic number.

It is an amenable number.

34031221 is a deficient number, since it is larger than the sum of its proper divisors (4861611).

34031221 is an equidigital number, since it uses as much as digits as its factorization.

34031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861610.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 34031221 is about 5833.6284592010. The cubic root of 34031221 is about 324.0603104972.

Adding to 34031221 its reverse (12213043), we get a palindrome (46244264).

It can be divided in two parts, 3403 and 1221, that added together give a square (4624 = 68²).

The spelling of 34031221 in words is "thirty-four million, thirty-one thousand, two hundred twenty-one".