77213227 has 12 divisors (see below), whose sum is σ = 95555280. Its totient is φ = 61090848.

The previous prime is 77213221. The next prime is 77213237. The reversal of 77213227 is 72231277.

It is not a de Polignac number, because 77213227 - 2¹¹ = 77211179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77213221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31452 + ... + 33817.

It is an arithmetic number, because the mean of its divisors is an integer number (7962940).

Almost surely, 2^77213227 is an apocalyptic number.

77213227 is a deficient number, since it is larger than the sum of its proper divisors (18342053).

77213227 is a wasteful number, since it uses less digits than its factorization.

77213227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65302 (or 65289 counting only the distinct ones).

The product of its digits is 8232, while the sum is 31.

The square root of 77213227 is about 8787.1057237295. The cubic root of 77213227 is about 425.8244241822.

The spelling of 77213227 in words is "seventy-seven million, two hundred thirteen thousand, two hundred twenty-seven".