84811131 has 28 divisors (see below), whose sum is σ = 127907232. Its totient is φ = 56208816.

The previous prime is 84811087. The next prime is 84811151. The reversal of 84811131 is 13111848.

It is not a de Polignac number, because 84811131 - 2⁹ = 84810619 is a prime.

It is a super-2 number, since 2×84811131² = 14385855882998322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 84811095 and 84811104.

It is not an unprimeable number, because it can be changed into a prime (84811151) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 230910 + ... + 231276.

Almost surely, 2^84811131 is an apocalyptic number.

84811131 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

84811131 is a deficient number, since it is larger than the sum of its proper divisors (43096101).

84811131 is an equidigital number, since it uses as much as digits as its factorization.

84811131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 687 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 84811131 is about 9209.2959014248. The cubic root of 84811131 is about 439.3570689223.

Adding to 84811131 its reverse (13111848), we get a palindrome (97922979).

The spelling of 84811131 in words is "eighty-four million, eight hundred eleven thousand, one hundred thirty-one".