61226550 has 384 divisors, whose sum is σ = 228556800. Its totient is φ = 11664000.

The previous prime is 61226513. The next prime is 61226579. The reversal of 61226550 is 5562216.

61226550 is a `hidden beast` number, since 6 + 1 + 2 + 2 + 655 + 0 = 666.

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

It is a zygodrome in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1975035 + ... + 1975065.

It is an arithmetic number, because the mean of its divisors is an integer number (595200).

Almost surely, 2^61226550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61226550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114278400).

61226550 is an abundant number, since it is smaller than the sum of its proper divisors (167330250).

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

61226550 is a wasteful number, since it uses less digits than its factorization.

61226550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 61226550 is about 7824.7396122810. The cubic root of 61226550 is about 394.1364459953.

Adding to 61226550 its reverse (5562216), we get a palindrome (66788766).

It can be divided in two parts, 61226 and 550, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61226550 in words is "sixty-one million, two hundred twenty-six thousand, five hundred fifty".