1222251510 has 128 divisors (see below), whose sum is σ = 3162654720. Its totient is φ = 301593600.

The previous prime is 1222251509. The next prime is 1222251517. The reversal of 1222251510 is 151522221.

1222251510 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222251517) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2988186 + ... + 2988594.

It is an arithmetic number, because the mean of its divisors is an integer number (24708240).

Almost surely, 2^1222251510 is an apocalyptic number.

1222251510 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 1222251510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1581327360).

1222251510 is an abundant number, since it is smaller than the sum of its proper divisors (1940403210).

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

1222251510 is a wasteful number, since it uses less digits than its factorization.

1222251510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1222251510 is about 34960.7138085023. The cubic root of 1222251510 is about 1069.1866500715.

Adding to 1222251510 its reverse (151522221), we get a palindrome (1373773731).

The spelling of 1222251510 in words is "one billion, two hundred twenty-two million, two hundred fifty-one thousand, five hundred ten".