61533530 has 16 divisors (see below), whose sum is σ = 112851144. Its totient is φ = 24148800.

The previous prime is 61533517. The next prime is 61533551. The reversal of 61533530 is 3533516.

It can be written as a sum of positive squares in 4 ways, for example, as 37100281 + 24433249 = 6091^2 + 4943^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61533530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57521 + ... + 58580.

Almost surely, 2^61533530 is an apocalyptic number.

61533530 is a deficient number, since it is larger than the sum of its proper divisors (51317614).

61533530 is a wasteful number, since it uses less digits than its factorization.

61533530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116161.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 61533530 is about 7844.3310740942. The cubic root of 61533530 is about 394.7940602499.

The spelling of 61533530 in words is "sixty-one million, five hundred thirty-three thousand, five hundred thirty".