61282220 has 96 divisors (see below), whose sum is σ = 143942400. Its totient is φ = 21821184.

The previous prime is 61282211. The next prime is 61282237. The reversal of 61282220 is 2228216.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 738299 + ... + 738381.

It is an arithmetic number, because the mean of its divisors is an integer number (1499400).

Almost surely, 2^61282220 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 61282220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71971200).

61282220 is an abundant number, since it is smaller than the sum of its proper divisors (82660180).

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

61282220 is a wasteful number, since it uses less digits than its factorization.

61282220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 61282220 is about 7828.2961109043. The cubic root of 61282220 is about 394.2558654803.

The spelling of 61282220 in words is "sixty-one million, two hundred eighty-two thousand, two hundred twenty".