1232321655 has 16 divisors (see below), whose sum is σ = 1972633824. Its totient is φ = 656931840.

The previous prime is 1232321647. The next prime is 1232321663. The reversal of 1232321655 is 5561232321.

It is an interprime number because it is at equal distance from previous prime (1232321647) and next prime (1232321663).

It is not a de Polignac number, because 1232321655 - 2³ = 1232321647 is a prime.

It is a super-2 number, since 2×1232321655² = 3037233322763878050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16207 + ... + 52223.

It is an arithmetic number, because the mean of its divisors is an integer number (123289614).

Almost surely, 2^1232321655 is an apocalyptic number.

1232321655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1232321655 is a deficient number, since it is larger than the sum of its proper divisors (740312169).

1232321655 is a wasteful number, since it uses less digits than its factorization.

1232321655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38306.

The product of its digits is 10800, while the sum is 30.

The square root of 1232321655 is about 35104.4392491890. The cubic root of 1232321655 is about 1072.1149698363.

Adding to 1232321655 its reverse (5561232321), we get a palindrome (6793553976).

The spelling of 1232321655 in words is "one billion, two hundred thirty-two million, three hundred twenty-one thousand, six hundred fifty-five".