427252181 has 2 divisors, whose sum is σ = 427252182. Its totient is φ = 427252180.

The previous prime is 427252169. The next prime is 427252187. The reversal of 427252181 is 181252724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296149681 + 131102500 = 17209^2 + 11450^2 .

It is a cyclic number.

It is not a de Polignac number, because 427252181 - 2¹⁴ = 427235797 is a prime.

It is a super-2 number, since 2×427252181² = 365088852338513522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427252187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213626090 + 213626091.

It is an arithmetic number, because the mean of its divisors is an integer number (213626091).

Almost surely, 2^427252181 is an apocalyptic number.

It is an amenable number.

427252181 is a deficient number, since it is larger than the sum of its proper divisors (1).

427252181 is an equidigital number, since it uses as much as digits as its factorization.

427252181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 32.

The square root of 427252181 is about 20670.0793660789. The cubic root of 427252181 is about 753.1730345011.

The spelling of 427252181 in words is "four hundred twenty-seven million, two hundred fifty-two thousand, one hundred eighty-one".