61224687 has 16 divisors (see below), whose sum is σ = 90881280. Its totient is φ = 40736376.

The previous prime is 61224661. The next prime is 61224719. The reversal of 61224687 is 78642216.

It is not a de Polignac number, because 61224687 - 2¹⁸ = 60962543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61224607) 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 15 ways as a sum of consecutive naturals, for example, 13918 + ... + 17780.

It is an arithmetic number, because the mean of its divisors is an integer number (5680080).

Almost surely, 2^61224687 is an apocalyptic number.

61224687 is a deficient number, since it is larger than the sum of its proper divisors (29656593).

61224687 is a wasteful number, since it uses less digits than its factorization.

61224687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459 (or 4453 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 61224687 is about 7824.6205658805. The cubic root of 61224687 is about 394.1324483633.

The spelling of 61224687 in words is "sixty-one million, two hundred twenty-four thousand, six hundred eighty-seven".