84231543 has 16 divisors (see below), whose sum is σ = 127846656. Its totient is φ = 48829440.

The previous prime is 84231533. The next prime is 84231547. The reversal of 84231543 is 34513248.

It is not a de Polignac number, because 84231543 - 2¹⁸ = 83969399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84231543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84231547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54730 + ... + 56247.

It is an arithmetic number, because the mean of its divisors is an integer number (7990416).

Almost surely, 2^84231543 is an apocalyptic number.

84231543 is a deficient number, since it is larger than the sum of its proper divisors (43615113).

84231543 is a wasteful number, since it uses less digits than its factorization.

84231543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111014.

The product of its digits is 11520, while the sum is 30.

The square root of 84231543 is about 9177.7744034161. The cubic root of 84231543 is about 438.3539444238.

It can be divided in two parts, 842 and 31543, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 84231543 in words is "eighty-four million, two hundred thirty-one thousand, five hundred forty-three".