231067381 has 2 divisors, whose sum is σ = 231067382. Its totient is φ = 231067380.

The previous prime is 231067373. The next prime is 231067391. The reversal of 231067381 is 183760132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152744881 + 78322500 = 12359^2 + 8850^2 .

It is a cyclic number.

It is not a de Polignac number, because 231067381 - 2³ = 231067373 is a prime.

It is a super-2 number, since 2×231067381² = 106784269124398322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231067321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115533690 + 115533691.

It is an arithmetic number, because the mean of its divisors is an integer number (115533691).

Almost surely, 2^231067381 is an apocalyptic number.

It is an amenable number.

231067381 is a deficient number, since it is larger than the sum of its proper divisors (1).

231067381 is an equidigital number, since it uses as much as digits as its factorization.

231067381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 231067381 is about 15200.9006641054. The cubic root of 231067381 is about 613.6388970164.

The spelling of 231067381 in words is "two hundred thirty-one million, sixty-seven thousand, three hundred eighty-one".