1222553448 has 72 divisors (see below), whose sum is σ = 3421530450. Its totient is φ = 394349760.

The previous prime is 1222553447. The next prime is 1222553471. The reversal of 1222553448 is 8443552221.

It can be written as a sum of positive squares in only one way, i.e., 1158585444 + 63968004 = 34038^2 + 7998^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1222553443) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 60358 + ... + 78026.

Almost surely, 2^1222553448 is an apocalyptic number.

1222553448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222553448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710765225).

1222553448 is an abundant number, since it is smaller than the sum of its proper divisors (2198977002).

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

1222553448 is a wasteful number, since it uses less digits than its factorization.

1222553448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17743 (or 17705 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 1222553448 is about 34965.0317889173. The cubic root of 1222553448 is about 1069.2746847345.

The spelling of 1222553448 in words is "one billion, two hundred twenty-two million, five hundred fifty-three thousand, four hundred forty-eight".