1921222308 has 24 divisors (see below), whose sum is σ = 4483823680. Its totient is φ = 640268640.

The previous prime is 1921222301. The next prime is 1921222319. The reversal of 1921222308 is 8032221291.

It is a super-3 number, since 3×1921222308³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1921222301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51138 + ... + 80358.

Almost surely, 2^1921222308 is an apocalyptic number.

It is an amenable number.

1921222308 is an abundant number, since it is smaller than the sum of its proper divisors (2562601372).

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

1921222308 is a wasteful number, since it uses less digits than its factorization.

1921222308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34707 (or 34705 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1921222308 is about 43831.7499992870. The cubic root of 1921222308 is about 1243.1566960952.

Adding to 1921222308 its reverse (8032221291), we get a palindrome (9953443599).

The spelling of 1921222308 in words is "one billion, nine hundred twenty-one million, two hundred twenty-two thousand, three hundred eight".