61224500 has 24 divisors (see below), whose sum is σ = 133715400. Its totient is φ = 24489600.

The previous prime is 61224467. The next prime is 61224523. The reversal of 61224500 is 542216.

It is a happy number.

61224500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15038884 + 46185616 = 3878^2 + 6796^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 60725 + ... + 61724.

It is an arithmetic number, because the mean of its divisors is an integer number (5571475).

Almost surely, 2^61224500 is an apocalyptic number.

It is an amenable number.

61224500 is an abundant number, since it is smaller than the sum of its proper divisors (72490900).

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

61224500 is a wasteful number, since it uses less digits than its factorization.

61224500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122468 (or 122456 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 61224500 is about 7824.6086164102. The cubic root of 61224500 is about 394.1320470935.

Adding to 61224500 its reverse (542216), we get a palindrome (61766716).

The spelling of 61224500 in words is "sixty-one million, two hundred twenty-four thousand, five hundred".