7216850621 has 2 divisors, whose sum is σ = 7216850622. Its totient is φ = 7216850620.

The previous prime is 7216850587. The next prime is 7216850689. The reversal of 7216850621 is 1260586127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6252064900 + 964785721 = 79070^2 + 31061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7216850621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7216850021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608425310 + 3608425311.

It is an arithmetic number, because the mean of its divisors is an integer number (3608425311).

Almost surely, 2^7216850621 is an apocalyptic number.

It is an amenable number.

7216850621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216850621 is an equidigital number, since it uses as much as digits as its factorization.

7216850621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 7216850621 is about 84952.0489511583. The cubic root of 7216850621 is about 1932.4839933138.

The spelling of 7216850621 in words is "seven billion, two hundred sixteen million, eight hundred fifty thousand, six hundred twenty-one".