73721222 has 4 divisors (see below), whose sum is σ = 110581836. Its totient is φ = 36860610.

The previous prime is 73721209. The next prime is 73721243. The reversal of 73721222 is 22212737.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 73721191 and 73721200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18430304 + ... + 18430307.

It is an arithmetic number, because the mean of its divisors is an integer number (27645459).

Almost surely, 2^73721222 is an apocalyptic number.

73721222 is a deficient number, since it is larger than the sum of its proper divisors (36860614).

73721222 is a wasteful number, since it uses less digits than its factorization.

73721222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36860613.

The product of its digits is 2352, while the sum is 26.

The square root of 73721222 is about 8586.1063352372. The cubic root of 73721222 is about 419.3057730087.

Adding to 73721222 its reverse (22212737), we get a palindrome (95933959).

The spelling of 73721222 in words is "seventy-three million, seven hundred twenty-one thousand, two hundred twenty-two".