355221222 has 16 divisors (see below), whose sum is σ = 752233392. Its totient is φ = 111441920.

The previous prime is 355221221. The next prime is 355221259. The reversal of 355221222 is 222122553.

It is a junction number, because it is equal to n+sod(n) for n = 355221192 and 355221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355221221) 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, 1741179 + ... + 1741382.

It is an arithmetic number, because the mean of its divisors is an integer number (47014587).

Almost surely, 2^355221222 is an apocalyptic number.

355221222 is an abundant number, since it is smaller than the sum of its proper divisors (397012170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

355221222 is a wasteful number, since it uses less digits than its factorization.

355221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482583.

The product of its digits is 2400, while the sum is 24.

The square root of 355221222 is about 18847.3133894463. The cubic root of 355221222 is about 708.2169249749.

Adding to 355221222 its reverse (222122553), we get a palindrome (577343775).

The spelling of 355221222 in words is "three hundred fifty-five million, two hundred twenty-one thousand, two hundred twenty-two".