84216530 has 8 divisors (see below), whose sum is σ = 151589772. Its totient is φ = 33686608.

The previous prime is 84216529. The next prime is 84216563. The reversal of 84216530 is 3561248.

It can be written as a sum of positive squares in 2 ways, for example, as 75916369 + 8300161 = 8713^2 + 2881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84216493 and 84216502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210817 + ... + 4210836.

Almost surely, 2^84216530 is an apocalyptic number.

84216530 is a deficient number, since it is larger than the sum of its proper divisors (67373242).

84216530 is a wasteful number, since it uses less digits than its factorization.

84216530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8421660.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 84216530 is about 9176.9564671518. The cubic root of 84216530 is about 438.3278995537.

Adding to 84216530 its reverse (3561248), we get a palindrome (87777778).

The spelling of 84216530 in words is "eighty-four million, two hundred sixteen thousand, five hundred thirty".