73222220 has 12 divisors (see below), whose sum is σ = 153766704. Its totient is φ = 29288880.

The previous prime is 73222211. The next prime is 73222243. The reversal of 73222220 is 2222237.

It is a super-2 number, since 2×73222220² = 10722987003456800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3661111 = 73222220 / (7 + 3 + 2 + 2 + 2 + 2 + 2 + 0).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 73222192 and 73222201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830536 + ... + 1830575.

It is an arithmetic number, because the mean of its divisors is an integer number (12813892).

Almost surely, 2^73222220 is an apocalyptic number.

It is an amenable number.

73222220 is an abundant number, since it is smaller than the sum of its proper divisors (80544484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73222220 is a wasteful number, since it uses less digits than its factorization.

73222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661120 (or 3661118 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 73222220 is about 8556.9983054807. The cubic root of 73222220 is about 418.3575689343.

Adding to 73222220 its reverse (2222237), we get a palindrome (75444457).

The spelling of 73222220 in words is "seventy-three million, two hundred twenty-two thousand, two hundred twenty".