73222661 has 4 divisors (see below), whose sum is σ = 73242732. Its totient is φ = 73202592.

The previous prime is 73222657. The next prime is 73222673. The reversal of 73222661 is 16622237.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33292900 + 39929761 = 5770^2 + 6319^2 .

It is a cyclic number.

It is not a de Polignac number, because 73222661 - 2² = 73222657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73222601) by changing a digit.

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, 2846 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (18310683).

Almost surely, 2^73222661 is an apocalyptic number.

It is an amenable number.

73222661 is a deficient number, since it is larger than the sum of its proper divisors (20071).

73222661 is a wasteful number, since it uses less digits than its factorization.

73222661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20070.

The product of its digits is 6048, while the sum is 29.

The square root of 73222661 is about 8557.0240738238. The cubic root of 73222661 is about 418.3584088220.

Adding to 73222661 its reverse (16622237), we get a palindrome (89844898).

The spelling of 73222661 in words is "seventy-three million, two hundred twenty-two thousand, six hundred sixty-one".