27771157 has 2 divisors, whose sum is σ = 27771158. Its totient is φ = 27771156.

The previous prime is 27771131. The next prime is 27771167. The reversal of 27771157 is 75117772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27730756 + 40401 = 5266^2 + 201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27771157 is a prime.

It is a super-2 number, since 2×27771157² = 1542474322237298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27771167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885578 + 13885579.

It is an arithmetic number, because the mean of its divisors is an integer number (13885579).

Almost surely, 2^27771157 is an apocalyptic number.

It is an amenable number.

27771157 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771157 is an equidigital number, since it uses as much as digits as its factorization.

27771157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24010, while the sum is 37.

The square root of 27771157 is about 5269.8346273863. The cubic root of 27771157 is about 302.8293687235.

The spelling of 27771157 in words is "twenty-seven million, seven hundred seventy-one thousand, one hundred fifty-seven".