84512231 has 4 divisors (see below), whose sum is σ = 87238464. Its totient is φ = 81786000.

The previous prime is 84512227. The next prime is 84512261. The reversal of 84512231 is 13221548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84512231 - 2² = 84512227 is a prime.

It is a super-2 number, since 2×84512231² = 14284634377194722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84512231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84512261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363070 + ... + 1363131.

It is an arithmetic number, because the mean of its divisors is an integer number (21809616).

Almost surely, 2^84512231 is an apocalyptic number.

84512231 is a deficient number, since it is larger than the sum of its proper divisors (2726233).

84512231 is a wasteful number, since it uses less digits than its factorization.

84512231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726232.

The product of its digits is 1920, while the sum is 26.

The square root of 84512231 is about 9193.0534100483. The cubic root of 84512231 is about 438.8403191197.

Adding to 84512231 its reverse (13221548), we get a palindrome (97733779).

The spelling of 84512231 in words is "eighty-four million, five hundred twelve thousand, two hundred thirty-one".