1231808258 has 16 divisors (see below), whose sum is σ = 1880879616. Its totient is φ = 604879440.

The previous prime is 1231808251. The next prime is 1231808261. The reversal of 1231808258 is 8528081321.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 75935 + ... + 90717.

It is an arithmetic number, because the mean of its divisors is an integer number (117554976).

Almost surely, 2^1231808258 is an apocalyptic number.

1231808258 is a deficient number, since it is larger than the sum of its proper divisors (649071358).

1231808258 is a wasteful number, since it uses less digits than its factorization.

1231808258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15529.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 1231808258 is about 35097.1260646794. The cubic root of 1231808258 is about 1071.9660647023.

Adding to 1231808258 its reverse (8528081321), we get a palindrome (9759889579).

The spelling of 1231808258 in words is "one billion, two hundred thirty-one million, eight hundred eight thousand, two hundred fifty-eight".