61433520 has 40 divisors (see below), whose sum is σ = 190444656. Its totient is φ = 16382208.

The previous prime is 61433509. The next prime is 61433521. The reversal of 61433520 is 2533416.

It is a happy number.

61433520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (61433521) 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, 127747 + ... + 128226.

Almost surely, 2^61433520 is an apocalyptic number.

61433520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61433520 is an abundant number, since it is smaller than the sum of its proper divisors (129011136).

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

61433520 is a wasteful number, since it uses less digits than its factorization.

61433520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255989 (or 255983 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 61433520 is about 7837.9538146126. The cubic root of 61433520 is about 394.5800589622.

Adding to 61433520 its reverse (2533416), we get a palindrome (63966936).

The spelling of 61433520 in words is "sixty-one million, four hundred thirty-three thousand, five hundred twenty".