84780231 has 32 divisors (see below), whose sum is σ = 121927680. Its totient is φ = 52276224.

The previous prime is 84780221. The next prime is 84780233. The reversal of 84780231 is 13208748.

It is not a de Polignac number, because 84780231 - 2⁶ = 84780167 is a prime.

It is a super-2 number, since 2×84780231² = 14375375136826722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84780192 and 84780201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84780233) 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 31 ways as a sum of consecutive naturals, for example, 354610 + ... + 354848.

It is an arithmetic number, because the mean of its divisors is an integer number (3810240).

Almost surely, 2^84780231 is an apocalyptic number.

84780231 is a deficient number, since it is larger than the sum of its proper divisors (37147449).

84780231 is a wasteful number, since it uses less digits than its factorization.

84780231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 84780231 is about 9207.6180959030. The cubic root of 84780231 is about 439.3037041404.

Adding to 84780231 its reverse (13208748), we get a palindrome (97988979).

The spelling of 84780231 in words is "eighty-four million, seven hundred eighty thousand, two hundred thirty-one".