1223431560 has 192 divisors, whose sum is σ = 4416595200. Its totient is φ = 301107456.

The previous prime is 1223431549. The next prime is 1223431577. The reversal of 1223431560 is 651343221.

1223431560 is a `hidden beast` number, since 1 + 223 + 431 + 5 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179169 + ... + 185871.

It is an arithmetic number, because the mean of its divisors is an integer number (23003100).

Almost surely, 2^1223431560 is an apocalyptic number.

1223431560 is a gapful number since it is divisible by the number (10) 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 1223431560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2208297600).

1223431560 is an abundant number, since it is smaller than the sum of its proper divisors (3193163640).

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

1223431560 is a wasteful number, since it uses less digits than its factorization.

1223431560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6726 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1223431560 is about 34977.5865376672. The cubic root of 1223431560 is about 1069.5306294327.

Adding to 1223431560 its reverse (651343221), we get a palindrome (1874774781).

The spelling of 1223431560 in words is "one billion, two hundred twenty-three million, four hundred thirty-one thousand, five hundred sixty".