1243220552 has 24 divisors (see below), whose sum is σ = 2711617110. Its totient is φ = 532808640.

The previous prime is 1243220549. The next prime is 1243220569. The reversal of 1243220552 is 2550223421.

It can be written as a sum of positive squares in only one way, i.e., 1146905956 + 96314596 = 33866^2 + 9814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1585349 + ... + 1586132.

Almost surely, 2^1243220552 is an apocalyptic number.

It is an amenable number.

1243220552 is an abundant number, since it is smaller than the sum of its proper divisors (1468396558).

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

1243220552 is a wasteful number, since it uses less digits than its factorization.

1243220552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171501 (or 3171490 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1243220552 is about 35259.3328354352. The cubic root of 1243220552 is about 1075.2663632722.

Adding to 1243220552 its reverse (2550223421), we get a palindrome (3793443973).

The spelling of 1243220552 in words is "one billion, two hundred forty-three million, two hundred twenty thousand, five hundred fifty-two".