427115581 has 2 divisors, whose sum is σ = 427115582. Its totient is φ = 427115580.

The previous prime is 427115569. The next prime is 427115587. The reversal of 427115581 is 185511724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374422500 + 52693081 = 19350^2 + 7259^2 .

It is a cyclic number.

It is not a de Polignac number, because 427115581 - 2⁷ = 427115453 is a prime.

It is a super-2 number, since 2×427115581² = 364855439065935122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427115587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213557790 + 213557791.

It is an arithmetic number, because the mean of its divisors is an integer number (213557791).

Almost surely, 2^427115581 is an apocalyptic number.

It is an amenable number.

427115581 is a deficient number, since it is larger than the sum of its proper divisors (1).

427115581 is an equidigital number, since it uses as much as digits as its factorization.

427115581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 34.

The square root of 427115581 is about 20666.7748088568. The cubic root of 427115581 is about 753.0927584115.

The spelling of 427115581 in words is "four hundred twenty-seven million, one hundred fifteen thousand, five hundred eighty-one".