1231063655 has 8 divisors (see below), whose sum is σ = 1483618032. Its totient is φ = 980623168.

The previous prime is 1231063609. The next prime is 1231063657. The reversal of 1231063655 is 5563601321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231063655 - 2⁶ = 1231063591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231063657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527189 + ... + 529518.

It is an arithmetic number, because the mean of its divisors is an integer number (185452254).

Almost surely, 2^1231063655 is an apocalyptic number.

1231063655 is a deficient number, since it is larger than the sum of its proper divisors (252554377).

1231063655 is a wasteful number, since it uses less digits than its factorization.

1231063655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056945.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 1231063655 is about 35086.5167122643. The cubic root of 1231063655 is about 1071.7500272830.

Adding to 1231063655 its reverse (5563601321), we get a palindrome (6794664976).

The spelling of 1231063655 in words is "one billion, two hundred thirty-one million, sixty-three thousand, six hundred fifty-five".