61530211 has 4 divisors (see below), whose sum is σ = 61571632. Its totient is φ = 61488792.

The previous prime is 61530197. The next prime is 61530241. The reversal of 61530211 is 11203516.

61530211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61530211 - 2⁵ = 61530179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61530241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18396 + ... + 21481.

It is an arithmetic number, because the mean of its divisors is an integer number (15392908).

Almost surely, 2^61530211 is an apocalyptic number.

61530211 is a deficient number, since it is larger than the sum of its proper divisors (41421).

61530211 is a wasteful number, since it uses less digits than its factorization.

61530211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41420.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61530211 is about 7844.1195171925. The cubic root of 61530211 is about 394.7869619788.

Adding to 61530211 its reverse (11203516), we get a palindrome (72733727).

The spelling of 61530211 in words is "sixty-one million, five hundred thirty thousand, two hundred eleven".