61182216 has 80 divisors (see below), whose sum is σ = 172497600. Its totient is φ = 20259936.

The previous prime is 61182197. The next prime is 61182217. The reversal of 61182216 is 61228116.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 61182216.

It is not an unprimeable number, because it can be changed into a prime (61182217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170245 + ... + 170603.

It is an arithmetic number, because the mean of its divisors is an integer number (2156220).

Almost surely, 2^61182216 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 61182216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86248800).

61182216 is an abundant number, since it is smaller than the sum of its proper divisors (111315384).

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

61182216 is a wasteful number, since it uses less digits than its factorization.

61182216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 627 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 61182216 is about 7821.9061615440. The cubic root of 61182216 is about 394.0412919353.

The spelling of 61182216 in words is "sixty-one million, one hundred eighty-two thousand, two hundred sixteen".