73218610 has 8 divisors (see below), whose sum is σ = 131793516. Its totient is φ = 29287440.

The previous prime is 73218601. The next prime is 73218611. The reversal of 73218610 is 1681237.

It can be written as a sum of positive squares in 2 ways, for example, as 61638201 + 11580409 = 7851^2 + 3403^2 .

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

It is not an unprimeable number, because it can be changed into a prime (73218611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3660921 + ... + 3660940.

Almost surely, 2^73218610 is an apocalyptic number.

73218610 is a deficient number, since it is larger than the sum of its proper divisors (58574906).

73218610 is a wasteful number, since it uses less digits than its factorization.

73218610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7321868.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 73218610 is about 8556.7873644260. The cubic root of 73218610 is about 418.3506935366.

Adding to 73218610 its reverse (1681237), we get a palindrome (74899847).

It can be divided in two parts, 7321 and 8610, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 73218610 in words is "seventy-three million, two hundred eighteen thousand, six hundred ten".