77227 has 4 divisors (see below), whose sum is σ = 79920. Its totient is φ = 74536.

The previous prime is 77213. The next prime is 77237. The reversal of 77227 is 72277.

77227 = T₅₈ + T₅₉ + ... + T₈₆.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1303 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (19980).

2⁷⁷²²⁷ is an apocalyptic number.

77227 is a deficient number, since it is larger than the sum of its proper divisors (2693).

77227 is a wasteful number, since it uses less digits than its factorization.

77227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692.

The product of its digits is 1372, while the sum is 25.

The square root of 77227 is about 277.8974631046. The cubic root of 77227 is about 42.5849741654.

Subtracting from 77227 its product of digits (1372), we obtain a triangular number (75855 = T₃₈₉).

Subtracting from 77227 its reverse (72277), we obtain a triangular number (4950 = T₉₉).

The spelling of 77227 in words is "seventy-seven thousand, two hundred twenty-seven", and thus it is an iban number.