61297216 has 14 divisors (see below), whose sum is σ = 121636790. Its totient is φ = 30648576.

The previous prime is 61297207. The next prime is 61297217. The reversal of 61297216 is 61279216.

It can be written as a sum of positive squares in only one way, i.e., 53231616 + 8065600 = 7296^2 + 2840^2 .

It is not an unprimeable number, because it can be changed into a prime (61297217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478821 + ... + 478948.

Almost surely, 2^61297216 is an apocalyptic number.

It is an amenable number.

61297216 is a deficient number, since it is larger than the sum of its proper divisors (60339574).

61297216 is an equidigital number, since it uses as much as digits as its factorization.

61297216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957781 (or 957771 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 61297216 is about 7829.2538597238. The cubic root of 61297216 is about 394.2880215106.

The spelling of 61297216 in words is "sixty-one million, two hundred ninety-seven thousand, two hundred sixteen".