213055541 has 2 divisors, whose sum is σ = 213055542. Its totient is φ = 213055540.

The previous prime is 213055499. The next prime is 213055589. The reversal of 213055541 is 145550312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126472516 + 86583025 = 11246^2 + 9305^2 .

It is a cyclic number.

It is not a de Polignac number, because 213055541 - 2⁶ = 213055477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213055541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213055741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106527770 + 106527771.

It is an arithmetic number, because the mean of its divisors is an integer number (106527771).

Almost surely, 2^213055541 is an apocalyptic number.

It is an amenable number.

213055541 is a deficient number, since it is larger than the sum of its proper divisors (1).

213055541 is an equidigital number, since it uses as much as digits as its factorization.

213055541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 213055541 is about 14596.4221986074. The cubic root of 213055541 is about 597.2611660781.

The spelling of 213055541 in words is "two hundred thirteen million, fifty-five thousand, five hundred forty-one".