80203621 has 2 divisors, whose sum is σ = 80203622. Its totient is φ = 80203620.

The previous prime is 80203561. The next prime is 80203633. The reversal of 80203621 is 12630208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58216900 + 21986721 = 7630^2 + 4689^2 .

It is a cyclic number.

It is not a de Polignac number, because 80203621 - 2¹¹ = 80201573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80203592 and 80203601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80203021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40101810 + 40101811.

It is an arithmetic number, because the mean of its divisors is an integer number (40101811).

Almost surely, 2^80203621 is an apocalyptic number.

It is an amenable number.

80203621 is a deficient number, since it is larger than the sum of its proper divisors (1).

80203621 is an equidigital number, since it uses as much as digits as its factorization.

80203621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 80203621 is about 8955.6474361154. The cubic root of 80203621 is about 431.2522017391.

Adding to 80203621 its reverse (12630208), we get a palindrome (92833829).

The spelling of 80203621 in words is "eighty million, two hundred three thousand, six hundred twenty-one".