1231808255 has 16 divisors (see below), whose sum is σ = 1522275744. Its totient is φ = 956188800.

The previous prime is 1231808251. The next prime is 1231808261. The reversal of 1231808255 is 5528081321.

It is not a de Polignac number, because 1231808255 - 2² = 1231808251 is a prime.

It is a super-2 number, since 2×1231808255² = 3034703154172290050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231808251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60080 + ... + 77930.

It is an arithmetic number, because the mean of its divisors is an integer number (95142234).

Almost surely, 2^1231808255 is an apocalyptic number.

1231808255 is a deficient number, since it is larger than the sum of its proper divisors (290467489).

1231808255 is a wasteful number, since it uses less digits than its factorization.

1231808255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18266.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 1231808255 is about 35097.1260219409. The cubic root of 1231808255 is about 1071.9660638320.

Adding to 1231808255 its reverse (5528081321), we get a palindrome (6759889576).

The spelling of 1231808255 in words is "one billion, two hundred thirty-one million, eight hundred eight thousand, two hundred fifty-five".