156181427 has 2 divisors, whose sum is σ = 156181428. Its totient is φ = 156181426.

The previous prime is 156181367. The next prime is 156181429. The reversal of 156181427 is 724181651.

It is a strong prime.

It is an emirp because it is prime and its reverse (724181651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156181427 - 2¹⁰ = 156180403 is a prime.

Together with 156181429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156181429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78090713 + 78090714.

It is an arithmetic number, because the mean of its divisors is an integer number (78090714).

Almost surely, 2^156181427 is an apocalyptic number.

156181427 is a deficient number, since it is larger than the sum of its proper divisors (1).

156181427 is an equidigital number, since it uses as much as digits as its factorization.

156181427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 156181427 is about 12497.2567789895. The cubic root of 156181427 is about 538.5298684187.

The spelling of 156181427 in words is "one hundred fifty-six million, one hundred eighty-one thousand, four hundred twenty-seven".