61305213 has 8 divisors (see below), whose sum is σ = 86548608. Its totient is φ = 38465984.

The previous prime is 61305187. The next prime is 61305221. The reversal of 61305213 is 31250316.

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 61305213 - 2⁶ = 61305149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61305213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61305613) 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, 600981 + ... + 601082.

It is an arithmetic number, because the mean of its divisors is an integer number (10818576).

Almost surely, 2^61305213 is an apocalyptic number.

It is an amenable number.

61305213 is a deficient number, since it is larger than the sum of its proper divisors (25243395).

61305213 is a wasteful number, since it uses less digits than its factorization.

61305213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202083.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 61305213 is about 7829.7645558471. The cubic root of 61305213 is about 394.3051673910.

Adding to 61305213 its reverse (31250316), we get a palindrome (92555529).

The spelling of 61305213 in words is "sixty-one million, three hundred five thousand, two hundred thirteen".