215048621 has 2 divisors, whose sum is σ = 215048622. Its totient is φ = 215048620.

The previous prime is 215048611. The next prime is 215048629. The reversal of 215048621 is 126840512.

215048621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190743721 + 24304900 = 13811^2 + 4930^2 .

It is a cyclic number.

It is not a de Polignac number, because 215048621 - 2⁶ = 215048557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215048629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107524310 + 107524311.

It is an arithmetic number, because the mean of its divisors is an integer number (107524311).

Almost surely, 2^215048621 is an apocalyptic number.

It is an amenable number.

215048621 is a deficient number, since it is larger than the sum of its proper divisors (1).

215048621 is an equidigital number, since it uses as much as digits as its factorization.

215048621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 215048621 is about 14664.5361672301. The cubic root of 215048621 is about 599.1177970174.

The spelling of 215048621 in words is "two hundred fifteen million, forty-eight thousand, six hundred twenty-one".