1222144152 has 16 divisors (see below), whose sum is σ = 3055360440. Its totient is φ = 407381376.

The previous prime is 1222144111. The next prime is 1222144153. The reversal of 1222144152 is 2514412221.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 50922673 = 1222144152 / (1 + 2 + 2 + 2 + 1 + 4 + 4 + 1 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222144153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25461313 + ... + 25461360.

Almost surely, 2^1222144152 is an apocalyptic number.

1222144152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222144152 is an abundant number, since it is smaller than the sum of its proper divisors (1833216288).

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

1222144152 is a wasteful number, since it uses less digits than its factorization.

1222144152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50922682 (or 50922678 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 1222144152 is about 34959.1783656310. The cubic root of 1222144152 is about 1069.1553447032.

Adding to 1222144152 its reverse (2514412221), we get a palindrome (3736556373).

The spelling of 1222144152 in words is "one billion, two hundred twenty-two million, one hundred forty-four thousand, one hundred fifty-two".