1231223198 has 16 divisors (see below), whose sum is σ = 1967190624. Its totient is φ = 575927040.

The previous prime is 1231223179. The next prime is 1231223251. The reversal of 1231223198 is 8913221321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102743 + ... + 114098.

It is an arithmetic number, because the mean of its divisors is an integer number (122949414).

Almost surely, 2^1231223198 is an apocalyptic number.

1231223198 is a deficient number, since it is larger than the sum of its proper divisors (735967426).

1231223198 is a wasteful number, since it uses less digits than its factorization.

1231223198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217027.

The product of its digits is 5184, while the sum is 32.

The square root of 1231223198 is about 35088.7902042803. The cubic root of 1231223198 is about 1071.7963240573.

The spelling of 1231223198 in words is "one billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred ninety-eight".