61225500 has 240 divisors, whose sum is σ = 220225824. Its totient is φ = 13171200.

The previous prime is 61225499. The next prime is 61225519. The reversal of 61225500 is 552216.

61225500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 3601492 + ... + 3601508.

Almost surely, 2^61225500 is an apocalyptic number.

61225500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61225500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110112912).

61225500 is an abundant number, since it is smaller than the sum of its proper divisors (159000324).

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

61225500 is a wasteful number, since it uses less digits than its factorization.

61225500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 61225500 is about 7824.6725171089. The cubic root of 61225500 is about 394.1341929115.

Adding to 61225500 its reverse (552216), we get a palindrome (61777716).

The spelling of 61225500 in words is "sixty-one million, two hundred twenty-five thousand, five hundred".