30052351621 has 2 divisors, whose sum is σ = 30052351622. Its totient is φ = 30052351620.

The previous prime is 30052351619. The next prime is 30052351627. The reversal of 30052351621 is 12615325003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20327630625 + 9724720996 = 142575^2 + 98614^2 .

It is a cyclic number.

It is not a de Polignac number, because 30052351621 - 2¹ = 30052351619 is a prime.

Together with 30052351619, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30052351621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30052351627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15026175810 + 15026175811.

It is an arithmetic number, because the mean of its divisors is an integer number (15026175811).

Almost surely, 2^30052351621 is an apocalyptic number.

It is an amenable number.

30052351621 is a deficient number, since it is larger than the sum of its proper divisors (1).

30052351621 is an equidigital number, since it uses as much as digits as its factorization.

30052351621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 30052351621 its reverse (12615325003), we get a palindrome (42667676624).

The spelling of 30052351621 in words is "thirty billion, fifty-two million, three hundred fifty-one thousand, six hundred twenty-one".