61530530 has 8 divisors (see below), whose sum is σ = 110754972. Its totient is φ = 24612208.

The previous prime is 61530527. The next prime is 61530533. The reversal of 61530530 is 3503516.

61530530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61530527) and next prime (61530533).

It can be written as a sum of positive squares in 2 ways, for example, as 53684929 + 7845601 = 7327^2 + 2801^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×61530530² = 7572012244161800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61530496 and 61530505.

It is not an unprimeable number, because it can be changed into a prime (61530533) 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 3 ways as a sum of consecutive naturals, for example, 3076517 + ... + 3076536.

Almost surely, 2^61530530 is an apocalyptic number.

61530530 is a deficient number, since it is larger than the sum of its proper divisors (49224442).

61530530 is a wasteful number, since it uses less digits than its factorization.

61530530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6153060.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 61530530 is about 7844.1398508696. The cubic root of 61530530 is about 394.7876442280.

The spelling of 61530530 in words is "sixty-one million, five hundred thirty thousand, five hundred thirty".