61216201 has 12 divisors (see below), whose sum is σ = 65650716. Its totient is φ = 56883200.

The previous prime is 61216163. The next prime is 61216213. The reversal of 61216201 is 10261216.

61216201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 24601600 + 36614601 = 4960^2 + 6051^2 .

It is not a de Polignac number, because 61216201 - 2¹⁹ = 60691913 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 (61216601) 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 11 ways as a sum of consecutive naturals, for example, 173241 + ... + 173593.

It is an arithmetic number, because the mean of its divisors is an integer number (5470893).

Almost surely, 2^61216201 is an apocalyptic number.

It is an amenable number.

61216201 is a deficient number, since it is larger than the sum of its proper divisors (4434515).

61216201 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (61216200) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (572).

61216201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61216201 is about 7824.0782843732. The cubic root of 61216201 is about 394.1142380483.

Adding to 61216201 its reverse (10261216), we get a palindrome (71477417).

The spelling of 61216201 in words is "sixty-one million, two hundred sixteen thousand, two hundred one".