61550530 has 16 divisors (see below), whose sum is σ = 115608384. Its totient is φ = 23549680.

The previous prime is 61550527. The next prime is 61550537. The reversal of 61550530 is 3505516.

It is a junction number, because it is equal to n+sod(n) for n = 61550495 and 61550504.

It is not an unprimeable number, because it can be changed into a prime (61550537) 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, 133576 + ... + 134035.

It is an arithmetic number, because the mean of its divisors is an integer number (7225524).

Almost surely, 2^61550530 is an apocalyptic number.

61550530 is a deficient number, since it is larger than the sum of its proper divisors (54057854).

61550530 is a wasteful number, since it uses less digits than its factorization.

61550530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267641.

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

The square root of 61550530 is about 7845.4145843289. The cubic root of 61550530 is about 394.8304137689.

The spelling of 61550530 in words is "sixty-one million, five hundred fifty thousand, five hundred thirty".