5205403421 has 4 divisors (see below), whose sum is σ = 5251469052. Its totient is φ = 5159337792.

The previous prime is 5205403393. The next prime is 5205403487. The reversal of 5205403421 is 1243045025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 900600100 + 4304803321 = 30010^2 + 65611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5205403421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205403921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23032646 + ... + 23032871.

It is an arithmetic number, because the mean of its divisors is an integer number (1312867263).

Almost surely, 2^5205403421 is an apocalyptic number.

It is an amenable number.

5205403421 is a deficient number, since it is larger than the sum of its proper divisors (46065631).

5205403421 is a wasteful number, since it uses less digits than its factorization.

5205403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46065630.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 5205403421 is about 72148.4817650379. The cubic root of 5205403421 is about 1733.0780868684.

Adding to 5205403421 its reverse (1243045025), we get a palindrome (6448448446).

The spelling of 5205403421 in words is "five billion, two hundred five million, four hundred three thousand, four hundred twenty-one".