73218742 has 12 divisors (see below), whose sum is σ = 115913916. Its totient is φ = 34682220.

The previous prime is 73218737. The next prime is 73218757. The reversal of 73218742 is 24781237.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 73218698 and 73218707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49984 + ... + 51427.

It is an arithmetic number, because the mean of its divisors is an integer number (9659493).

Almost surely, 2^73218742 is an apocalyptic number.

73218742 is a deficient number, since it is larger than the sum of its proper divisors (42695174).

73218742 is a wasteful number, since it uses less digits than its factorization.

73218742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101451 (or 101432 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 73218742 is about 8556.7950775977. The cubic root of 73218742 is about 418.3509449402.

Adding to 73218742 its reverse (24781237), we get a palindrome (97999979).

The spelling of 73218742 in words is "seventy-three million, two hundred eighteen thousand, seven hundred forty-two".