7407228181 has 2 divisors, whose sum is σ = 7407228182. Its totient is φ = 7407228180.

The previous prime is 7407228163. The next prime is 7407228197. The reversal of 7407228181 is 1818227047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6600100081 + 807128100 = 81241^2 + 28410^2 .

It is a cyclic number.

It is not a de Polignac number, because 7407228181 - 2⁵ = 7407228149 is a prime.

It is a super-2 number, since 2×7407228181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7407228481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3703614090 + 3703614091.

It is an arithmetic number, because the mean of its divisors is an integer number (3703614091).

Almost surely, 2^7407228181 is an apocalyptic number.

It is an amenable number.

7407228181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7407228181 is an equidigital number, since it uses as much as digits as its factorization.

7407228181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 7407228181 is about 86065.2553647522. The cubic root of 7407228181 is about 1949.3294368459.

The spelling of 7407228181 in words is "seven billion, four hundred seven million, two hundred twenty-eight thousand, one hundred eighty-one".