7220222231 has 4 divisors (see below), whose sum is σ = 7231924992. Its totient is φ = 7208519472.

The previous prime is 7220222209. The next prime is 7220222309. The reversal of 7220222231 is 1322220227.

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

It is a cyclic number.

It is not a de Polignac number, because 7220222231 - 2¹⁰ = 7220221207 is a prime.

It is a super-2 number, since 2×7220222231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7220222197 and 7220222206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220222131) 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, 5850455 + ... + 5851688.

It is an arithmetic number, because the mean of its divisors is an integer number (1807981248).

Almost surely, 2^7220222231 is an apocalyptic number.

7220222231 is a deficient number, since it is larger than the sum of its proper divisors (11702761).

7220222231 is a wasteful number, since it uses less digits than its factorization.

7220222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11702760.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 7220222231 is about 84971.8908286735. The cubic root of 7220222231 is about 1932.7848894756.

Adding to 7220222231 its reverse (1322220227), we get a palindrome (8542442458).

The spelling of 7220222231 in words is "seven billion, two hundred twenty million, two hundred twenty-two thousand, two hundred thirty-one".