4651530421 has 2 divisors, whose sum is σ = 4651530422. Its totient is φ = 4651530420.

The previous prime is 4651530383. The next prime is 4651530479. The reversal of 4651530421 is 1240351564.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4618697521 + 32832900 = 67961^2 + 5730^2 .

It is a cyclic number.

It is not a de Polignac number, because 4651530421 - 2¹¹ = 4651528373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4651530491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2325765210 + 2325765211.

It is an arithmetic number, because the mean of its divisors is an integer number (2325765211).

Almost surely, 2^4651530421 is an apocalyptic number.

It is an amenable number.

4651530421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4651530421 is an equidigital number, since it uses as much as digits as its factorization.

4651530421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 4651530421 is about 68202.1291529817. The cubic root of 4651530421 is about 1669.2906283582.

Adding to 4651530421 its reverse (1240351564), we get a palindrome (5891881985).

The spelling of 4651530421 in words is "four billion, six hundred fifty-one million, five hundred thirty thousand, four hundred twenty-one".