351423221 has 8 divisors (see below), whose sum is σ = 372622080. Its totient is φ = 330494688.

The previous prime is 351423199. The next prime is 351423229. The reversal of 351423221 is 122324153.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 351423221 - 2⁶ = 351423157 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 (351423229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64901 + ... + 70106.

It is an arithmetic number, because the mean of its divisors is an integer number (46577760).

Almost surely, 2^351423221 is an apocalyptic number.

It is an amenable number.

351423221 is a deficient number, since it is larger than the sum of its proper divisors (21198859).

351423221 is a wasteful number, since it uses less digits than its factorization.

351423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135163.

The product of its digits is 1440, while the sum is 23.

The square root of 351423221 is about 18746.2855254048. The cubic root of 351423221 is about 705.6838064649.

Adding to 351423221 its reverse (122324153), we get a palindrome (473747374).

The spelling of 351423221 in words is "three hundred fifty-one million, four hundred twenty-three thousand, two hundred twenty-one".