61930216 has 8 divisors (see below), whose sum is σ = 116119170. Its totient is φ = 30965104.

The previous prime is 61930181. The next prime is 61930217. The reversal of 61930216 is 61203916.

It can be written as a sum of positive squares in only one way, i.e., 58522500 + 3407716 = 7650^2 + 1846^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (61930217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3870631 + ... + 3870646.

Almost surely, 2^61930216 is an apocalyptic number.

It is an amenable number.

61930216 is a deficient number, since it is larger than the sum of its proper divisors (54188954).

61930216 is a wasteful number, since it uses less digits than its factorization.

61930216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741283 (or 7741279 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 61930216 is about 7869.5753379709. The cubic root of 61930216 is about 395.6406119371.

The spelling of 61930216 in words is "sixty-one million, nine hundred thirty thousand, two hundred sixteen".