84310231 has 2 divisors, whose sum is σ = 84310232. Its totient is φ = 84310230.

The previous prime is 84310217. The next prime is 84310241. The reversal of 84310231 is 13201348.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84310231 - 2⁷ = 84310103 is a prime.

It is a super-2 number, since 2×84310231² = 14216430102546722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84310241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42155115 + 42155116.

It is an arithmetic number, because the mean of its divisors is an integer number (42155116).

Almost surely, 2^84310231 is an apocalyptic number.

84310231 is a deficient number, since it is larger than the sum of its proper divisors (1).

84310231 is an equidigital number, since it uses as much as digits as its factorization.

84310231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 84310231 is about 9182.0602807867. The cubic root of 84310231 is about 438.4904034371.

Adding to 84310231 its reverse (13201348), we get a palindrome (97511579).

The spelling of 84310231 in words is "eighty-four million, three hundred ten thousand, two hundred thirty-one".