84000051 has 16 divisors (see below), whose sum is σ = 124646400. Its totient is φ = 55909224.

The previous prime is 84000047. The next prime is 84000053. The reversal of 84000051 is 15000048.

It is not a de Polignac number, because 84000051 - 2² = 84000047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83999988 and 84000033.

It is not an unprimeable number, because it can be changed into a prime (84000053) 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, 17250 + ... + 21576.

It is an arithmetic number, because the mean of its divisors is an integer number (7790400).

Almost surely, 2^84000051 is an apocalyptic number.

84000051 is a deficient number, since it is larger than the sum of its proper divisors (40646349).

84000051 is a wasteful number, since it uses less digits than its factorization.

84000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055 (or 5049 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 84000051 is about 9165.1541721894. The cubic root of 84000051 is about 437.9520026219.

Adding to 84000051 its reverse (15000048), we get a palindrome (99000099).

The spelling of 84000051 in words is "eighty-four million, fifty-one", and thus it is an aban number.