77731227 has 24 divisors (see below), whose sum is σ = 128583936. Its totient is φ = 44325936.

The previous prime is 77731219. The next prime is 77731249. The reversal of 77731227 is 72213777.

It is not a de Polignac number, because 77731227 - 2³ = 77731219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77731191 and 77731200.

It is not an unprimeable number, because it can be changed into a prime (77731267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39808 + ... + 41714.

It is an arithmetic number, because the mean of its divisors is an integer number (5357664).

Almost surely, 2^77731227 is an apocalyptic number.

77731227 is a deficient number, since it is larger than the sum of its proper divisors (50852709).

77731227 is a wasteful number, since it uses less digits than its factorization.

77731227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567 (or 2564 counting only the distinct ones).

The product of its digits is 28812, while the sum is 36.

The square root of 77731227 is about 8816.5314608410. The cubic root of 77731227 is about 426.7745447298.

The spelling of 77731227 in words is "seventy-seven million, seven hundred thirty-one thousand, two hundred twenty-seven".