355226421 has 16 divisors (see below), whose sum is σ = 539159040. Its totient is φ = 205927920.

The previous prime is 355226387. The next prime is 355226491. The reversal of 355226421 is 124622553.

It is not a de Polignac number, because 355226421 - 2⁹ = 355225909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355226491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233251 + ... + 234768.

It is an arithmetic number, because the mean of its divisors is an integer number (33697440).

Almost surely, 2^355226421 is an apocalyptic number.

It is an amenable number.

355226421 is a deficient number, since it is larger than the sum of its proper divisors (183932619).

355226421 is a wasteful number, since it uses less digits than its factorization.

355226421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468056.

The product of its digits is 14400, while the sum is 30.

The square root of 355226421 is about 18847.4513131086. The cubic root of 355226421 is about 708.2203801005.

Adding to 355226421 its reverse (124622553), we get a palindrome (479848974).

The spelling of 355226421 in words is "three hundred fifty-five million, two hundred twenty-six thousand, four hundred twenty-one".