61020216 has 56 divisors (see below), whose sum is σ = 171557280. Its totient is φ = 20338128.

The previous prime is 61020209. The next prime is 61020221. The reversal of 61020216 is 61202016.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 in 13 ways as a sum of consecutive naturals, for example, 601 + ... + 11063.

Almost surely, 2^61020216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61020216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85778640).

61020216 is an abundant number, since it is smaller than the sum of its proper divisors (110537064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61020216 is a wasteful number, since it uses less digits than its factorization.

61020216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487 (or 10468 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61020216 is about 7811.5437654794. The cubic root of 61020216 is about 393.6931999700.

The spelling of 61020216 in words is "sixty-one million, twenty thousand, two hundred sixteen".