1231018560 has 224 divisors, whose sum is σ = 4398873600. Its totient is φ = 328084992.

The previous prime is 1231018553. The next prime is 1231018571. The reversal of 1231018560 is 658101321.

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 31 ways as a sum of consecutive naturals, for example, 698961 + ... + 700719.

Almost surely, 2^1231018560 is an apocalyptic number.

1231018560 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 1231018560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199436800).

1231018560 is an abundant number, since it is smaller than the sum of its proper divisors (3167855040).

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

1231018560 is an frugal number, since it uses more digits than its factorization.

1231018560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1769 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1231018560 is about 35085.8740806040. The cubic root of 1231018560 is about 1071.7369407250.

Adding to 1231018560 its reverse (658101321), we get a palindrome (1889119881).

The spelling of 1231018560 in words is "one billion, two hundred thirty-one million, eighteen thousand, five hundred sixty".