61216173 has 6 divisors (see below), whose sum is σ = 88423374. Its totient is φ = 40810776.

The previous prime is 61216163. The next prime is 61216213. The reversal of 61216173 is 37161216.

It can be written as a sum of positive squares in only one way, i.e., 35784324 + 25431849 = 5982^2 + 5043^2 .

It is not a de Polignac number, because 61216173 - 2¹⁰ = 61215149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3400890 + ... + 3400907.

It is an arithmetic number, because the mean of its divisors is an integer number (14737229).

Almost surely, 2^61216173 is an apocalyptic number.

It is an amenable number.

61216173 is a deficient number, since it is larger than the sum of its proper divisors (27207201).

61216173 is a wasteful number, since it uses less digits than its factorization.

61216173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6801803 (or 6801800 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 61216173 is about 7824.0764950248. The cubic root of 61216173 is about 394.1141779597.

Adding to 61216173 its reverse (37161216), we get a palindrome (98377389).

The spelling of 61216173 in words is "sixty-one million, two hundred sixteen thousand, one hundred seventy-three".