1231226255 has 16 divisors (see below), whose sum is σ = 1697876544. Its totient is φ = 839600640.

The previous prime is 1231226251. The next prime is 1231226299. The reversal of 1231226255 is 5526221321.

It is not a de Polignac number, because 1231226255 - 2² = 1231226251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231226251) 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, 90842 + ... + 103511.

It is an arithmetic number, because the mean of its divisors is an integer number (106117284).

Almost surely, 2^1231226255 is an apocalyptic number.

1231226255 is a deficient number, since it is larger than the sum of its proper divisors (466650289).

1231226255 is a wasteful number, since it uses less digits than its factorization.

1231226255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194546.

The product of its digits is 7200, while the sum is 29.

The square root of 1231226255 is about 35088.8337651738. The cubic root of 1231226255 is about 1071.7972111097.

Adding to 1231226255 its reverse (5526221321), we get a palindrome (6757447576).

The spelling of 1231226255 in words is "one billion, two hundred thirty-one million, two hundred twenty-six thousand, two hundred fifty-five".