61255216 has 80 divisors (see below), whose sum is σ = 139812480. Its totient is φ = 25687040.

The previous prime is 61255151. The next prime is 61255217.

61255216 is nontrivially palindromic in base 7 and base 10.

61255216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61255217) 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 15 ways as a sum of consecutive naturals, for example, 176355 + ... + 176701.

It is an arithmetic number, because the mean of its divisors is an integer number (1747656).

Almost surely, 2^61255216 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 61255216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69906240).

61255216 is an abundant number, since it is smaller than the sum of its proper divisors (78557264).

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

61255216 is a wasteful number, since it uses less digits than its factorization.

61255216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 436 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 61255216 is about 7826.5711521713. The cubic root of 61255216 is about 394.1979473785.

The spelling of 61255216 in words is "sixty-one million, two hundred fifty-five thousand, two hundred sixteen".