1311771227 has 4 divisors (see below), whose sum is σ = 1412676720. Its totient is φ = 1210865736.

The previous prime is 1311771211. The next prime is 1311771233. The reversal of 1311771227 is 7221771131.

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

It is a cyclic number.

It is not a de Polignac number, because 1311771227 - 2⁴ = 1311771211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311771193 and 1311771202.

It is not an unprimeable number, because it can be changed into a prime (1311771257) 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 3 ways as a sum of consecutive naturals, for example, 50452727 + ... + 50452752.

It is an arithmetic number, because the mean of its divisors is an integer number (353169180).

Almost surely, 2^1311771227 is an apocalyptic number.

1311771227 is a deficient number, since it is larger than the sum of its proper divisors (100905493).

1311771227 is a wasteful number, since it uses less digits than its factorization.

1311771227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100905492.

The product of its digits is 4116, while the sum is 32.

The square root of 1311771227 is about 36218.3824459348. The cubic root of 1311771227 is about 1094.6771014027.

The spelling of 1311771227 in words is "one billion, three hundred eleven million, seven hundred seventy-one thousand, two hundred twenty-seven".