7221042313 has 2 divisors, whose sum is σ = 7221042314. Its totient is φ = 7221042312.

The previous prime is 7221042263. The next prime is 7221042329. The reversal of 7221042313 is 3132401227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7212765184 + 8277129 = 84928^2 + 2877^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221042313 - 2¹⁷ = 7220911241 is a prime.

It is a super-2 number, since 2×7221042313² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7221042373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610521156 + 3610521157.

It is an arithmetic number, because the mean of its divisors is an integer number (3610521157).

Almost surely, 2^7221042313 is an apocalyptic number.

It is an amenable number.

7221042313 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221042313 is an equidigital number, since it uses as much as digits as its factorization.

7221042313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 7221042313 is about 84976.7162992311. The cubic root of 7221042313 is about 1932.8580627585.

The spelling of 7221042313 in words is "seven billion, two hundred twenty-one million, forty-two thousand, three hundred thirteen".