61545228 has 24 divisors (see below), whose sum is σ = 143845632. Its totient is φ = 20480784.

The previous prime is 61545227. The next prime is 61545271. The reversal of 61545228 is 82254516.

61545228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61545227) 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 7 ways as a sum of consecutive naturals, for example, 3801 + ... + 11727.

It is an arithmetic number, because the mean of its divisors is an integer number (5993568).

Almost surely, 2^61545228 is an apocalyptic number.

It is an amenable number.

61545228 is an abundant number, since it is smaller than the sum of its proper divisors (82300404).

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

61545228 is a wasteful number, since it uses less digits than its factorization.

61545228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8581 (or 8579 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 61545228 is about 7845.0766726655. The cubic root of 61545228 is about 394.8190764662.

The spelling of 61545228 in words is "sixty-one million, five hundred forty-five thousand, two hundred twenty-eight".