61224700 has 36 divisors (see below), whose sum is σ = 133663320. Its totient is φ = 24341440.

The previous prime is 61224661. The next prime is 61224719. The reversal of 61224700 is 742216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15531 + ... + 19069.

It is an arithmetic number, because the mean of its divisors is an integer number (3712870).

Almost surely, 2^61224700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61224700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66831660).

61224700 is an abundant number, since it is smaller than the sum of its proper divisors (72438620).

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

61224700 is a wasteful number, since it uses less digits than its factorization.

61224700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 61224700 is about 7824.6213965917. The cubic root of 61224700 is about 394.1324762590.

Adding to 61224700 its reverse (742216), we get a palindrome (61966916).

The spelling of 61224700 in words is "sixty-one million, two hundred twenty-four thousand, seven hundred".