31228191199 has 2 divisors, whose sum is σ = 31228191200. Its totient is φ = 31228191198.

The previous prime is 31228191187. The next prime is 31228191277. The reversal of 31228191199 is 99119182213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31228191199 - 2¹⁵ = 31228158431 is a prime.

It is a super-2 number, since 2×31228191199² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31228191119) by changing a digit.

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 as a sum of consecutive naturals, namely, 15614095599 + 15614095600.

It is an arithmetic number, because the mean of its divisors is an integer number (15614095600).

Almost surely, 2^31228191199 is an apocalyptic number.

31228191199 is a deficient number, since it is larger than the sum of its proper divisors (1).

31228191199 is an equidigital number, since it uses as much as digits as its factorization.

31228191199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 46.

The spelling of 31228191199 in words is "thirty-one billion, two hundred twenty-eight million, one hundred ninety-one thousand, one hundred ninety-nine".