231200002999981 has 2 divisors, whose sum is σ = 231200002999982. Its totient is φ = 231200002999980.

The previous prime is 231200002999969. The next prime is 231200003000053. The reversal of 231200002999981 is 189999200002132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202708257129225 + 28491745870756 = 14237565^2 + 5337766^2 .

It is a cyclic number.

It is not a de Polignac number, because 231200002999981 - 2¹⁷ = 231200002868909 is a prime.

It is a super-2 number, since 2×231200002999981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231200002999951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115600001499990 + 115600001499991.

It is an arithmetic number, because the mean of its divisors is an integer number (115600001499991).

Almost surely, 2^{231200002999981} is an apocalyptic number.

It is an amenable number.

231200002999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

231200002999981 is an equidigital number, since it uses as much as digits as its factorization.

231200002999981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The spelling of 231200002999981 in words is "two hundred thirty-one trillion, two hundred billion, two million, nine hundred ninety-nine thousand, nine hundred eighty-one".