355340421 has 48 divisors (see below), whose sum is σ = 540259200. Its totient is φ = 224902656.

The previous prime is 355340389. The next prime is 355340423. The reversal of 355340421 is 124043553.

It is not a de Polignac number, because 355340421 - 2⁵ = 355340389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355340423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3449856 + ... + 3449958.

It is an arithmetic number, because the mean of its divisors is an integer number (11255400).

Almost surely, 2^355340421 is an apocalyptic number.

It is an amenable number.

355340421 is a deficient number, since it is larger than the sum of its proper divisors (184918779).

355340421 is a wasteful number, since it uses less digits than its factorization.

355340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 355340421 is about 18850.4753520966. The cubic root of 355340421 is about 708.2961331821.

Adding to 355340421 its reverse (124043553), we get a palindrome (479383974).

The spelling of 355340421 in words is "three hundred fifty-five million, three hundred forty thousand, four hundred twenty-one".