7337813221 has 2 divisors, whose sum is σ = 7337813222. Its totient is φ = 7337813220.

The previous prime is 7337813179. The next prime is 7337813227. The reversal of 7337813221 is 1223187337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4828304196 + 2509509025 = 69486^2 + 50095^2 .

It is an emirp because it is prime and its reverse (1223187337) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7337813221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7337813227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3668906610 + 3668906611.

It is an arithmetic number, because the mean of its divisors is an integer number (3668906611).

Almost surely, 2^7337813221 is an apocalyptic number.

It is an amenable number.

7337813221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7337813221 is an equidigital number, since it uses as much as digits as its factorization.

7337813221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 7337813221 is about 85661.0367728526. The cubic root of 7337813221 is about 1943.2211005628.

The spelling of 7337813221 in words is "seven billion, three hundred thirty-seven million, eight hundred thirteen thousand, two hundred twenty-one".