3656421222 has 32 divisors (see below), whose sum is σ = 7373843424. Its totient is φ = 1208659200.

The previous prime is 3656421221. The next prime is 3656421247. The reversal of 3656421222 is 2221246563.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656421221) 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, 1133572 + ... + 1136792.

It is an arithmetic number, because the mean of its divisors is an integer number (230432607).

Almost surely, 2^3656421222 is an apocalyptic number.

3656421222 is an abundant number, since it is smaller than the sum of its proper divisors (3717422202).

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

3656421222 is a wasteful number, since it uses less digits than its factorization.

3656421222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744.

The product of its digits is 34560, while the sum is 33.

The square root of 3656421222 is about 60468.3489273521. The cubic root of 3656421222 is about 1540.5840846777.

Adding to 3656421222 its reverse (2221246563), we get a palindrome (5877667785).

The spelling of 3656421222 in words is "three billion, six hundred fifty-six million, four hundred twenty-one thousand, two hundred twenty-two".