77225219 has 2 divisors, whose sum is σ = 77225220. Its totient is φ = 77225218.

The previous prime is 77225201. The next prime is 77225221. The reversal of 77225219 is 91252277.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77225219 is a prime.

It is a super-2 number, since 2×77225219² = 11927468899195922, which contains 22 as substring.

Together with 77225221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77225299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38612609 + 38612610.

It is an arithmetic number, because the mean of its divisors is an integer number (38612610).

Almost surely, 2^77225219 is an apocalyptic number.

77225219 is a deficient number, since it is larger than the sum of its proper divisors (1).

77225219 is an equidigital number, since it uses as much as digits as its factorization.

77225219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 77225219 is about 8787.7880607124. The cubic root of 77225219 is about 425.8464679967.

The spelling of 77225219 in words is "seventy-seven million, two hundred twenty-five thousand, two hundred nineteen".