1216622350 has 12 divisors (see below), whose sum is σ = 2262917664. Its totient is φ = 486648920.

The previous prime is 1216622339. The next prime is 1216622353. The reversal of 1216622350 is 532266121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216622353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12166174 + ... + 12166273.

It is an arithmetic number, because the mean of its divisors is an integer number (188576472).

Almost surely, 2^1216622350 is an apocalyptic number.

1216622350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216622350 is a deficient number, since it is larger than the sum of its proper divisors (1046295314).

1216622350 is a wasteful number, since it uses less digits than its factorization.

1216622350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24332459 (or 24332454 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1216622350 is about 34880.1139619698. The cubic root of 1216622350 is about 1067.5427205123.

Adding to 1216622350 its reverse (532266121), we get a palindrome (1748888471).

The spelling of 1216622350 in words is "one billion, two hundred sixteen million, six hundred twenty-two thousand, three hundred fifty".