216457741 has 2 divisors, whose sum is σ = 216457742. Its totient is φ = 216457740.

The previous prime is 216457729. The next prime is 216457751. The reversal of 216457741 is 147754612.

216457741 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., 183060900 + 33396841 = 13530^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 216457741 - 2⁹ = 216457229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216457741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216457751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108228870 + 108228871.

It is an arithmetic number, because the mean of its divisors is an integer number (108228871).

Almost surely, 2^216457741 is an apocalyptic number.

It is an amenable number.

216457741 is a deficient number, since it is larger than the sum of its proper divisors (1).

216457741 is an equidigital number, since it uses as much as digits as its factorization.

216457741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 216457741 is about 14712.5028802036. The cubic root of 216457741 is about 600.4235352188.

The spelling of 216457741 in words is "two hundred sixteen million, four hundred fifty-seven thousand, seven hundred forty-one".