427156223401 has 2 divisors, whose sum is σ = 427156223402. Its totient is φ = 427156223400.

The previous prime is 427156223381. The next prime is 427156223411. The reversal of 427156223401 is 104322651724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248143459600 + 179012763801 = 498140^2 + 423099^2 .

It is a cyclic number.

It is not a de Polignac number, because 427156223401 - 2⁵ = 427156223369 is a prime.

It is not a weakly prime, because it can be changed into another prime (427156223411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213578111700 + 213578111701.

It is an arithmetic number, because the mean of its divisors is an integer number (213578111701).

Almost surely, 2^427156223401 is an apocalyptic number.

It is an amenable number.

427156223401 is a deficient number, since it is larger than the sum of its proper divisors (1).

427156223401 is an equidigital number, since it uses as much as digits as its factorization.

427156223401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 427156223401 in words is "four hundred twenty-seven billion, one hundred fifty-six million, two hundred twenty-three thousand, four hundred one".