61304550 has 96 divisors (see below), whose sum is σ = 166730400. Its totient is φ = 14837760.

The previous prime is 61304539. The next prime is 61304563. The reversal of 61304550 is 5540316.

It is a self number, because there is not a number n which added to its sum of digits gives 61304550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73536 + ... + 74364.

It is an arithmetic number, because the mean of its divisors is an integer number (1736775).

Almost surely, 2^61304550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61304550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83365200).

61304550 is an abundant number, since it is smaller than the sum of its proper divisors (105425850).

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

61304550 is a wasteful number, since it uses less digits than its factorization.

61304550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 61304550 is about 7829.7222172948. The cubic root of 61304550 is about 394.3037459497.

Adding to 61304550 its reverse (5540316), we get a palindrome (66844866).

The spelling of 61304550 in words is "sixty-one million, three hundred four thousand, five hundred fifty".