61245550 has 48 divisors (see below), whose sum is σ = 125170560. Its totient is φ = 22191840.

The previous prime is 61245539. The next prime is 61245557. The reversal of 61245550 is 5554216.

61245550 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 (61245557) 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 23 ways as a sum of consecutive naturals, for example, 20449 + ... + 23251.

It is an arithmetic number, because the mean of its divisors is an integer number (2607720).

Almost surely, 2^61245550 is an apocalyptic number.

61245550 is an abundant number, since it is smaller than the sum of its proper divisors (63925010).

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

61245550 is a wasteful number, since it uses less digits than its factorization.

61245550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857 (or 2852 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 61245550 is about 7825.9536160138. The cubic root of 61245550 is about 394.1772116325.

Adding to 61245550 its reverse (5554216), we get a palindrome (66799766).

The spelling of 61245550 in words is "sixty-one million, two hundred forty-five thousand, five hundred fifty".