61306255 has 8 divisors (see below), whose sum is σ = 77439600. Its totient is φ = 46463616.

The previous prime is 61306253. The next prime is 61306279. The reversal of 61306255 is 55260316.

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

It is a cyclic number.

It is not a de Polignac number, because 61306255 - 2¹ = 61306253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61306253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322570 + ... + 322759.

It is an arithmetic number, because the mean of its divisors is an integer number (9679950).

Almost surely, 2^61306255 is an apocalyptic number.

61306255 is a deficient number, since it is larger than the sum of its proper divisors (16133345).

61306255 is a wasteful number, since it uses less digits than its factorization.

61306255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645353.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 61306255 is about 7829.8310965180. The cubic root of 61306255 is about 394.3074013699.

The spelling of 61306255 in words is "sixty-one million, three hundred six thousand, two hundred fifty-five".