61203530 has 16 divisors (see below), whose sum is σ = 110362824. Its totient is φ = 24437760.

The previous prime is 61203523. The next prime is 61203533. The reversal of 61203530 is 3530216.

61203530 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 52983841 + 8219689 = 7279^2 + 2867^2 .

It is not an unprimeable number, because it can be changed into a prime (61203533) by changing a digit.

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, 770 + ... + 11090.

Almost surely, 2^61203530 is an apocalyptic number.

61203530 is a deficient number, since it is larger than the sum of its proper divisors (49159294).

61203530 is a wasteful number, since it uses less digits than its factorization.

61203530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10921.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 61203530 is about 7823.2684985241. The cubic root of 61203530 is about 394.0870439068.

Adding to 61203530 its reverse (3530216), we get a palindrome (64733746).

The spelling of 61203530 in words is "sixty-one million, two hundred three thousand, five hundred thirty".