213000061 has 8 divisors (see below), whose sum is σ = 215498360. Its totient is φ = 210511872.

The previous prime is 213000049. The next prime is 213000097. The reversal of 213000061 is 160000312.

It can be written as a sum of positive squares in 4 ways, for example, as 2576025 + 210424036 = 1605^2 + 14506^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213000061 - 2⁷ = 212999933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44941 + ... + 49453.

It is an arithmetic number, because the mean of its divisors is an integer number (26937295).

Almost surely, 2^213000061 is an apocalyptic number.

It is an amenable number.

213000061 is a deficient number, since it is larger than the sum of its proper divisors (2498299).

213000061 is a wasteful number, since it uses less digits than its factorization.

213000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 213000061 is about 14594.5216091518. The cubic root of 213000061 is about 597.2093189932.

Adding to 213000061 its reverse (160000312), we get a palindrome (373000373).

The spelling of 213000061 in words is "two hundred thirteen million, sixty-one", and thus it is an aban number.