1231055648 has 24 divisors (see below), whose sum is σ = 2456846028. Its totient is φ = 607094784.

The previous prime is 1231055641. The next prime is 1231055669. The reversal of 1231055648 is 8465501321.

It can be written as a sum of positive squares in 2 ways, for example, as 1163355664 + 67699984 = 34108^2 + 8228^2 .

It is not an unprimeable number, because it can be changed into a prime (1231055641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261161 + ... + 265832.

Almost surely, 2^1231055648 is an apocalyptic number.

It is an amenable number.

1231055648 is a deficient number, since it is larger than the sum of its proper divisors (1225790380).

1231055648 is an equidigital number, since it uses as much as digits as its factorization.

1231055648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527076 (or 527068 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1231055648 is about 35086.4026084180. The cubic root of 1231055648 is about 1071.7477036769.

Adding to 1231055648 its reverse (8465501321), we get a palindrome (9696556969).

The spelling of 1231055648 in words is "one billion, two hundred thirty-one million, fifty-five thousand, six hundred forty-eight".