61030520 has 16 divisors (see below), whose sum is σ = 137318760. Its totient is φ = 24412192.

The previous prime is 61030513. The next prime is 61030531. The reversal of 61030520 is 2503016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762842 + ... + 762921.

Almost surely, 2^61030520 is an apocalyptic number.

It is an amenable number.

61030520 is an abundant number, since it is smaller than the sum of its proper divisors (76288240).

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

61030520 is a wasteful number, since it uses less digits than its factorization.

61030520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525774 (or 1525770 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 61030520 is about 7812.2032743650. The cubic root of 61030520 is about 393.7153586724.

Adding to 61030520 its reverse (2503016), we get a palindrome (63533536).

The spelling of 61030520 in words is "sixty-one million, thirty thousand, five hundred twenty".