234251221 has 4 divisors (see below), whose sum is σ = 241807744. Its totient is φ = 226694700.

The previous prime is 234251203. The next prime is 234251239. The reversal of 234251221 is 122152432.

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.

It is an interprime number because it is at equal distance from previous prime (234251203) and next prime (234251239).

It is a cyclic number.

It is not a de Polignac number, because 234251221 - 2²³ = 225862613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 234251192 and 234251201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234251201) 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, 3778215 + ... + 3778276.

It is an arithmetic number, because the mean of its divisors is an integer number (60451936).

Almost surely, 2^234251221 is an apocalyptic number.

It is an amenable number.

234251221 is a deficient number, since it is larger than the sum of its proper divisors (7556523).

234251221 is an equidigital number, since it uses as much as digits as its factorization.

234251221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7556522.

The product of its digits is 960, while the sum is 22.

The square root of 234251221 is about 15305.2677532933. The cubic root of 234251221 is about 616.4444607091. Note that the first 4 decimals are identical.

The spelling of 234251221 in words is "two hundred thirty-four million, two hundred fifty-one thousand, two hundred twenty-one".