1143223564 has 12 divisors (see below), whose sum is σ = 2286447184. Its totient is φ = 489952944.

The previous prime is 1143223561. The next prime is 1143223573. The reversal of 1143223564 is 4653223411.

1143223564 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1143223561) 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, 20414679 + ... + 20414734.

Almost surely, 2^1143223564 is an apocalyptic number.

1143223564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1143223564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1143223564 is a wasteful number, since it uses less digits than its factorization.

1143223564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40829424 (or 40829422 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 1143223564 is about 33811.5891966054. The cubic root of 1143223564 is about 1045.6276424582.

Adding to 1143223564 its reverse (4653223411), we get a palindrome (5796446975).

The spelling of 1143223564 in words is "one billion, one hundred forty-three million, two hundred twenty-three thousand, five hundred sixty-four".