213730541 has 2 divisors, whose sum is σ = 213730542. Its totient is φ = 213730540.

The previous prime is 213730357. The next prime is 213730547. The reversal of 213730541 is 145037312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 21353641 = 13870^2 + 4621^2 .

It is a cyclic number.

It is not a de Polignac number, because 213730541 - 2¹⁸ = 213468397 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213730541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213730547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106865270 + 106865271.

It is an arithmetic number, because the mean of its divisors is an integer number (106865271).

Almost surely, 2^213730541 is an apocalyptic number.

It is an amenable number.

213730541 is a deficient number, since it is larger than the sum of its proper divisors (1).

213730541 is an equidigital number, since it uses as much as digits as its factorization.

213730541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 213730541 is about 14619.5260183085. The cubic root of 213730541 is about 597.8912463535.

Adding to 213730541 its reverse (145037312), we get a palindrome (358767853).

The spelling of 213730541 in words is "two hundred thirteen million, seven hundred thirty thousand, five hundred forty-one".