61043520 has 56 divisors (see below), whose sum is σ = 193816224. Its totient is φ = 16278016.

The previous prime is 61043519. The next prime is 61043527. The reversal of 61043520 is 2534016.

It is a happy number.

It is a super-2 number, since 2×61043520² = 7452622667980800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61043527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30834 + ... + 32753.

It is an arithmetic number, because the mean of its divisors is an integer number (3461004).

Almost surely, 2^61043520 is an apocalyptic number.

61043520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61043520 is an abundant number, since it is smaller than the sum of its proper divisors (132772704).

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

61043520 is a wasteful number, since it uses less digits than its factorization.

61043520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63607 (or 63597 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 61043520 is about 7813.0352616637. The cubic root of 61043520 is about 393.7433115518.

Adding to 61043520 its reverse (2534016), we get a palindrome (63577536).

The spelling of 61043520 in words is "sixty-one million, forty-three thousand, five hundred twenty".