802271621 has 2 divisors, whose sum is σ = 802271622. Its totient is φ = 802271620.

The previous prime is 802271611. The next prime is 802271651. The reversal of 802271621 is 126172208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665124100 + 137147521 = 25790^2 + 11711^2 .

It is a cyclic number.

It is not a de Polignac number, because 802271621 - 2²² = 798077317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (802271611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401135810 + 401135811.

It is an arithmetic number, because the mean of its divisors is an integer number (401135811).

Almost surely, 2^802271621 is an apocalyptic number.

It is an amenable number.

802271621 is a deficient number, since it is larger than the sum of its proper divisors (1).

802271621 is an equidigital number, since it uses as much as digits as its factorization.

802271621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 802271621 is about 28324.3997465083. The cubic root of 802271621 is about 929.1955972608.

The spelling of 802271621 in words is "eight hundred two million, two hundred seventy-one thousand, six hundred twenty-one".