61505530 has 16 divisors (see below), whose sum is σ = 111018240. Its totient is φ = 24533712.

The previous prime is 61505513. The next prime is 61505551. The reversal of 61505530 is 3550516.

It is a junction number, because it is equal to n+sod(n) for n = 61505495 and 61505504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4710 + ... + 12049.

It is an arithmetic number, because the mean of its divisors is an integer number (6938640).

Almost surely, 2^61505530 is an apocalyptic number.

61505530 is a deficient number, since it is larger than the sum of its proper divisors (49512710).

61505530 is a wasteful number, since it uses less digits than its factorization.

61505530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17133.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 61505530 is about 7842.5461426759. The cubic root of 61505530 is about 394.7341692669.

The spelling of 61505530 in words is "sixty-one million, five hundred five thousand, five hundred thirty".