355243421 has 8 divisors (see below), whose sum is σ = 382972800. Its totient is φ = 327571632.

The previous prime is 355243397. The next prime is 355243463. The reversal of 355243421 is 124342553.

It is a happy number.

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 355243421 - 2¹⁰ = 355242397 is a prime.

It is a super-3 number, since 3×355243421³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355243121) 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, 1121 + ... + 26678.

It is an arithmetic number, because the mean of its divisors is an integer number (47871600).

Almost surely, 2^355243421 is an apocalyptic number.

It is an amenable number.

355243421 is a deficient number, since it is larger than the sum of its proper divisors (27729379).

355243421 is a wasteful number, since it uses less digits than its factorization.

355243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28795.

The product of its digits is 14400, while the sum is 29.

The square root of 355243421 is about 18847.9022970727. The cubic root of 355243421 is about 708.2316776408.

Adding to 355243421 its reverse (124342553), we get a palindrome (479585974).

The spelling of 355243421 in words is "three hundred fifty-five million, two hundred forty-three thousand, four hundred twenty-one".