1222515450 has 192 divisors, whose sum is σ = 3718512000. Its totient is φ = 293414400.

The previous prime is 1222515419. The next prime is 1222515493. The reversal of 1222515450 is 545152221.

1222515450 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 718701 + ... + 720399.

It is an arithmetic number, because the mean of its divisors is an integer number (19367250).

Almost surely, 2^1222515450 is an apocalyptic number.

1222515450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222515450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1859256000).

1222515450 is an abundant number, since it is smaller than the sum of its proper divisors (2495996550).

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

1222515450 is a wasteful number, since it uses less digits than its factorization.

1222515450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774 (or 1763 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1222515450 is about 34964.4884132458. The cubic root of 1222515450 is about 1069.2636066311.

Adding to 1222515450 its reverse (545152221), we get a palindrome (1767667671).

The spelling of 1222515450 in words is "one billion, two hundred twenty-two million, five hundred fifteen thousand, four hundred fifty".