421500051 has 16 divisors (see below), whose sum is σ = 713651200. Its totient is φ = 240857064.

The previous prime is 421500031. The next prime is 421500103. The reversal of 421500051 is 150005124.

It is not a de Polignac number, because 421500051 - 2⁶ = 421499987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421499997 and 421500033.

It is not an unprimeable number, because it can be changed into a prime (421500011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114891 + ... + 1115268.

It is an arithmetic number, because the mean of its divisors is an integer number (44603200).

Almost surely, 2^421500051 is an apocalyptic number.

421500051 is a deficient number, since it is larger than the sum of its proper divisors (292151149).

421500051 is a wasteful number, since it uses less digits than its factorization.

421500051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230175 (or 2230169 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 421500051 is about 20530.4664097044. The cubic root of 421500051 is about 749.7777421418. Note that the first 4 decimals are identical.

Adding to 421500051 its reverse (150005124), we get a palindrome (571505175).

The spelling of 421500051 in words is "four hundred twenty-one million, five hundred thousand, fifty-one".