712222321 has 4 divisors (see below), whose sum is σ = 725660532. Its totient is φ = 698784112.

The previous prime is 712222307. The next prime is 712222333. The reversal of 712222321 is 123222217.

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 364810000 + 347412321 = 19100^2 + 18639^2 .

It is a cyclic number.

It is not a de Polignac number, because 712222321 - 2¹¹ = 712220273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 712222292 and 712222301.

It is not an unprimeable number, because it can be changed into a prime (712222351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6719026 + ... + 6719131.

It is an arithmetic number, because the mean of its divisors is an integer number (181415133).

Almost surely, 2^712222321 is an apocalyptic number.

It is an amenable number.

712222321 is a deficient number, since it is larger than the sum of its proper divisors (13438211).

712222321 is a wasteful number, since it uses less digits than its factorization.

712222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438210.

The product of its digits is 672, while the sum is 22.

The square root of 712222321 is about 26687.4937189688. The cubic root of 712222321 is about 893.0419501374.

Adding to 712222321 its reverse (123222217), we get a palindrome (835444538).

The spelling of 712222321 in words is "seven hundred twelve million, two hundred twenty-two thousand, three hundred twenty-one".